20104009156 has 36 divisors (see below), whose sum is σ = 44195597824. Its totient is φ = 7832729520.

The previous prime is 20104009111. The next prime is 20104009169. The reversal of 20104009156 is 65190040102.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2963556 + ... + 2970331.

Almost surely, 2^20104009156 is an apocalyptic number.

It is an amenable number.

20104009156 is an abundant number, since it is smaller than the sum of its proper divisors (24091588668).

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

20104009156 is a wasteful number, since it uses less digits than its factorization.

20104009156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933920 (or 5933907 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 20104009156 its reverse (65190040102), we get a palindrome (85294049258).

The spelling of 20104009156 in words is "twenty billion, one hundred four million, nine thousand, one hundred fifty-six".