21975103752 has 64 divisors (see below), whose sum is σ = 66090547200. Its totient is φ = 5948147520.

The previous prime is 21975103697. The next prime is 21975103757. The reversal of 21975103752 is 25730157912.

It is a super-2 number, since 2×21975103752² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (21975103757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3439024 + ... + 3445407.

It is an arithmetic number, because the mean of its divisors is an integer number (1032664800).

Almost surely, 2^21975103752 is an apocalyptic number.

It is an amenable number.

21975103752 is an abundant number, since it is smaller than the sum of its proper divisors (44115443448).

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

21975103752 is a wasteful number, since it uses less digits than its factorization.

21975103752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884466 (or 6884462 counting only the distinct ones).

The product of its (nonzero) digits is 132300, while the sum is 42.

The spelling of 21975103752 in words is "twenty-one billion, nine hundred seventy-five million, one hundred three thousand, seven hundred fifty-two".