21867519752 has 48 divisors (see below), whose sum is σ = 45150858000. Its totient is φ = 9921602496.

The previous prime is 21867519749. The next prime is 21867519757. The reversal of 21867519752 is 25791576812.

It is a super-2 number, since 2×21867519752² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21867519694 and 21867519703.

It is not an unprimeable number, because it can be changed into a prime (21867519757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57302 + ... + 216837.

It is an arithmetic number, because the mean of its divisors is an integer number (940642875).

Almost surely, 2^21867519752 is an apocalyptic number.

It is an amenable number.

21867519752 is an abundant number, since it is smaller than the sum of its proper divisors (23283338248).

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

21867519752 is a wasteful number, since it uses less digits than its factorization.

21867519752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274230 (or 274213 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 53.

The spelling of 21867519752 in words is "twenty-one billion, eight hundred sixty-seven million, five hundred nineteen thousand, seven hundred fifty-two".