20432576856 has 32 divisors (see below), whose sum is σ = 51210134640. Its totient is φ = 6793699968.

The previous prime is 20432576851. The next prime is 20432576867. The reversal of 20432576856 is 65867523402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432576851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062711 + ... + 1081766.

Almost surely, 2^20432576856 is an apocalyptic number.

It is an amenable number.

20432576856 is an abundant number, since it is smaller than the sum of its proper divisors (30777557784).

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

20432576856 is a wasteful number, since it uses less digits than its factorization.

20432576856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144883 (or 2144879 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 20432576856 in words is "twenty billion, four hundred thirty-two million, five hundred seventy-six thousand, eight hundred fifty-six".