20538570038872 has 8 divisors (see below), whose sum is σ = 38509818822900. Its totient is φ = 10269285019432.

The previous prime is 20538570038849. The next prime is 20538570038881. The reversal of 20538570038872 is 27883007583502.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283660627422 + ... + 1283660627437.

Almost surely, 2^{20538570038872} is an apocalyptic number.

It is an amenable number.

20538570038872 is a deficient number, since it is larger than the sum of its proper divisors (17971248784028).

20538570038872 is a wasteful number, since it uses less digits than its factorization.

20538570038872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567321254865 (or 2567321254861 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 58.

The spelling of 20538570038872 in words is "twenty trillion, five hundred thirty-eight billion, five hundred seventy million, thirty-eight thousand, eight hundred seventy-two".