20127122455264 has 48 divisors (see below), whose sum is σ = 43413096046320. Its totient is φ = 9109427215360.

The previous prime is 20127122455261. The next prime is 20127122455267. The reversal of 20127122455264 is 46255422172102.

It is an interprime number because it is at equal distance from previous prime (20127122455261) and next prime (20127122455267).

It is a self number, because there is not a number n which added to its sum of digits gives 20127122455264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127122455261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122620399 + ... + 122784430.

It is an arithmetic number, because the mean of its divisors is an integer number (904439500965).

Almost surely, 2^{20127122455264} is an apocalyptic number.

It is an amenable number.

20127122455264 is an abundant number, since it is smaller than the sum of its proper divisors (23285973591056).

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

20127122455264 is a wasteful number, since it uses less digits than its factorization.

20127122455264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245405083 (or 245405075 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 20127122455264 in words is "twenty trillion, one hundred twenty-seven billion, one hundred twenty-two million, four hundred fifty-five thousand, two hundred sixty-four".