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20060040 = 233571113167
BaseRepresentation
bin100110010000…
…1011110001000
31101202011012110
41030201132020
520113410130
61553542320
7332336040
oct114413610
941664173
1020060040
1110361450
1268749a0
134204860
142942720
151b63ab0
hex1321788

20060040 has 256 divisors, whose sum is σ = 81285120. Its totient is φ = 3824640.

The previous prime is 20060009. The next prime is 20060087. The reversal of 20060040 is 4006002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 20059998 and 20060025.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120037 + ... + 120203.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

Almost surely, 220060040 is an apocalyptic number.

20060040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20060040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

20060040 is an abundant number, since it is smaller than the sum of its proper divisors (61225080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20060040 is a wasteful number, since it uses less digits than its factorization.

20060040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20060040 is about 4478.8436007523. The cubic root of 20060040 is about 271.7131130309.

Adding to 20060040 its reverse (4006002), we get a palindrome (24066042).

The spelling of 20060040 in words is "twenty million, sixty thousand, forty".