20329518456 has 64 divisors (see below), whose sum is σ = 60814807200. Its totient is φ = 6255235584.

The previous prime is 20329518421. The next prime is 20329518467. The reversal of 20329518456 is 65481592302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3617121 + ... + 3622736.

Almost surely, 2^20329518456 is an apocalyptic number.

20329518456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20329518456 is an abundant number, since it is smaller than the sum of its proper divisors (40485288744).

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

20329518456 is a wasteful number, since it uses less digits than its factorization.

20329518456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239885 (or 7239875 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 20329518456 in words is "twenty billion, three hundred twenty-nine million, five hundred eighteen thousand, four hundred fifty-six".