20004688626 has 16 divisors (see below), whose sum is σ = 43087021824. Its totient is φ = 6155288784.

The previous prime is 20004688607. The next prime is 20004688637. The reversal of 20004688626 is 62688640002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128235106 + ... + 128235261.

It is an arithmetic number, because the mean of its divisors is an integer number (2692938864).

Almost surely, 2^20004688626 is an apocalyptic number.

20004688626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20004688626 is an abundant number, since it is smaller than the sum of its proper divisors (23082333198).

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

20004688626 is a wasteful number, since it uses less digits than its factorization.

20004688626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256470385.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 20004688626 in words is "twenty billion, four million, six hundred eighty-eight thousand, six hundred twenty-six".