21888718533552 has 40 divisors (see below), whose sum is σ = 60895537460464. Its totient is φ = 6734990317824.

The previous prime is 21888718533527. The next prime is 21888718533557. The reversal of 21888718533552 is 25533581788812.

It is not an unprimeable number, because it can be changed into a prime (21888718533557) 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, 17539036663 + ... + 17539037910.

Almost surely, 2^{21888718533552} is an apocalyptic number.

It is an amenable number.

21888718533552 is an abundant number, since it is smaller than the sum of its proper divisors (39006818926912).

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

21888718533552 is a wasteful number, since it uses less digits than its factorization.

21888718533552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35078074597 (or 35078074591 counting only the distinct ones).

The product of its digits is 129024000, while the sum is 66.

The spelling of 21888718533552 in words is "twenty-one trillion, eight hundred eighty-eight billion, seven hundred eighteen million, five hundred thirty-three thousand, five hundred fifty-two".