20351616404 has 24 divisors (see below), whose sum is σ = 42106794240. Its totient is φ = 8421358176.

The previous prime is 20351616403. The next prime is 20351616431. The reversal of 20351616404 is 40461615302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351616403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530972 + ... + 12532595.

It is an arithmetic number, because the mean of its divisors is an integer number (1754449760).

Almost surely, 2^20351616404 is an apocalyptic number.

It is an amenable number.

20351616404 is an abundant number, since it is smaller than the sum of its proper divisors (21755177836).

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

20351616404 is a wasteful number, since it uses less digits than its factorization.

20351616404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25063607 (or 25063605 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 20351616404 in words is "twenty billion, three hundred fifty-one million, six hundred sixteen thousand, four hundred four".