21888201375 has 96 divisors (see below), whose sum is σ = 41064528960. Its totient is φ = 11504332800.

The previous prime is 21888201371. The next prime is 21888201397. The reversal of 21888201375 is 57310288812.

It is not a de Polignac number, because 21888201375 - 2² = 21888201371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21888201375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21888201371) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17984767 + ... + 17985983.

It is an arithmetic number, because the mean of its divisors is an integer number (427755510).

Almost surely, 2^21888201375 is an apocalyptic number.

21888201375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21888201375 is a deficient number, since it is larger than the sum of its proper divisors (19176327585).

21888201375 is an equidigital number, since it uses as much as digits as its factorization.

21888201375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 21888201375 in words is "twenty-one billion, eight hundred eighty-eight million, two hundred one thousand, three hundred seventy-five".