20071990904 has 16 divisors (see below), whose sum is σ = 43011409200. Its totient is φ = 8602281792.

The previous prime is 20071990903. The next prime is 20071990919. The reversal of 20071990904 is 40909917002.

It is a happy number.

It is a super-3 number, since 3×20071990904³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071990901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179214149 + ... + 179214260.

It is an arithmetic number, because the mean of its divisors is an integer number (2688213075).

Almost surely, 2^20071990904 is an apocalyptic number.

It is an amenable number.

20071990904 is an abundant number, since it is smaller than the sum of its proper divisors (22939418296).

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

20071990904 is a wasteful number, since it uses less digits than its factorization.

20071990904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358428422 (or 358428418 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 20071990904 in words is "twenty billion, seventy-one million, nine hundred ninety thousand, nine hundred four".