20256056042064 has 20 divisors (see below), whose sum is σ = 52328144775456. Its totient is φ = 6752018680672.

The previous prime is 20256056042059. The next prime is 20256056042077. The reversal of 20256056042064 is 46024065065202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211000583724 + ... + 211000583819.

Almost surely, 2^{20256056042064} is an apocalyptic number.

20256056042064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20256056042064 is an abundant number, since it is smaller than the sum of its proper divisors (32072088733392).

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

20256056042064 is a wasteful number, since it uses less digits than its factorization.

20256056042064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422001167554 (or 422001167548 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 20256056042064 in words is "twenty trillion, two hundred fifty-six billion, fifty-six million, forty-two thousand, sixty-four".