21313642152 has 64 divisors (see below), whose sum is σ = 61547428800. Its totient is φ = 6078755840.

The previous prime is 21313642151. The next prime is 21313642177. The reversal of 21313642152 is 25124631312.

It is a super-2 number, since 2×21313642152² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21313642151) 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, 2370027 + ... + 2379002.

It is an arithmetic number, because the mean of its divisors is an integer number (961678575).

Almost surely, 2^21313642152 is an apocalyptic number.

21313642152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21313642152 is an abundant number, since it is smaller than the sum of its proper divisors (40233786648).

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

21313642152 is a wasteful number, since it uses less digits than its factorization.

21313642152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749066 (or 4749062 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The spelling of 21313642152 in words is "twenty-one billion, three hundred thirteen million, six hundred forty-two thousand, one hundred fifty-two".