20455640644232 has 32 divisors (see below), whose sum is σ = 40163325871680. Its totient is φ = 9748563084480.

The previous prime is 20455640644199. The next prime is 20455640644423. The reversal of 20455640644232 is 23244604655402.

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, 196364819 + ... + 196468962.

It is an arithmetic number, because the mean of its divisors is an integer number (1255103933490).

Almost surely, 2^{20455640644232} is an apocalyptic number.

It is an amenable number.

20455640644232 is a deficient number, since it is larger than the sum of its proper divisors (19707685227448).

20455640644232 is a wasteful number, since it uses less digits than its factorization.

20455640644232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392834093 (or 392834089 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 47.

The spelling of 20455640644232 in words is "twenty trillion, four hundred fifty-five billion, six hundred forty million, six hundred forty-four thousand, two hundred thirty-two".