20040000 has 140 divisors (see below), whose sum is σ = 66653664. Its totient is φ = 5312000.

The previous prime is 20039993. The next prime is 20040049. The reversal of 20040000 is 4002.

It is a Harshad number since it is a multiple of its sum of digits (6).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119917 + ... + 120083.

Almost surely, 2^20040000 is an apocalyptic number.

20040000 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 20040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33326832).

20040000 is an abundant number, since it is smaller than the sum of its proper divisors (46613664).

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

20040000 is an equidigital number, since it uses as much as digits as its factorization.

20040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 20040000 is about 4476.6058571199. The cubic root of 20040000 is about 271.6226023270.

Adding to 20040000 its reverse (4002), we get a palindrome (20044002).

It can be divided in two parts, 200 and 40000, that multiplied together give a cube (8000000 = 200³).

The spelling of 20040000 in words is "twenty million, forty thousand".