20439722664432 has 60 divisors (see below), whose sum is σ = 57203472267760. Its totient is φ = 6813164980224.

The previous prime is 20439722664397. The next prime is 20439722664499. The reversal of 20439722664432 is 23446622793402.

20439722664432 is a `hidden beast` number, since 2 + 0 + 43 + 97 + 2 + 26 + 64 + 432 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13012944 + ... + 14498832.

Almost surely, 2^{20439722664432} is an apocalyptic number.

It is an amenable number.

20439722664432 is an abundant number, since it is smaller than the sum of its proper divisors (36763749603328).

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

20439722664432 is a wasteful number, since it uses less digits than its factorization.

20439722664432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581430 (or 1581421 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 54.

The spelling of 20439722664432 in words is "twenty trillion, four hundred thirty-nine billion, seven hundred twenty-two million, six hundred sixty-four thousand, four hundred thirty-two".