20462040 has 96 divisors (see below), whose sum is σ = 67223520. Its totient is φ = 5397504.

The previous prime is 20462017. The next prime is 20462041. The reversal of 20462040 is 4026402.

20462040 is a `hidden beast` number, since 2 + 0 + 4 + 620 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20462041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40429 + ... + 40931.

It is an arithmetic number, because the mean of its divisors is an integer number (700245).

Almost surely, 2^20462040 is an apocalyptic number.

20462040 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 20462040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33611760).

20462040 is an abundant number, since it is smaller than the sum of its proper divisors (46761480).

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

20462040 is a wasteful number, since it uses less digits than its factorization.

20462040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20462040 is about 4523.4986459598. The cubic root of 20462040 is about 273.5161510782.

Adding to 20462040 its reverse (4026402), we get a palindrome (24488442).

The spelling of 20462040 in words is "twenty million, four hundred sixty-two thousand, forty".