21152527180 has 48 divisors (see below), whose sum is σ = 44737862400. Its totient is φ = 8400742848.

The previous prime is 21152527129. The next prime is 21152527189. The reversal of 21152527180 is 8172525112.

It is a super-2 number, since 2×21152527180² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21152527189) 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 15 ways as a sum of consecutive naturals, for example, 1608271 + ... + 1621369.

It is an arithmetic number, because the mean of its divisors is an integer number (932038800).

Almost surely, 2^21152527180 is an apocalyptic number.

21152527180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152527180 is an abundant number, since it is smaller than the sum of its proper divisors (23585335220).

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

21152527180 is a wasteful number, since it uses less digits than its factorization.

21152527180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13678 (or 13676 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The spelling of 21152527180 in words is "twenty-one billion, one hundred fifty-two million, five hundred twenty-seven thousand, one hundred eighty".