21302565152 has 24 divisors (see below), whose sum is σ = 45752100912. Its totient is φ = 9682984000.

The previous prime is 21302565133. The next prime is 21302565169. The reversal of 21302565152 is 25156520312.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30258974 + ... + 30259677.

It is an arithmetic number, because the mean of its divisors is an integer number (1906337538).

Almost surely, 2^21302565152 is an apocalyptic number.

21302565152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21302565152 is an abundant number, since it is smaller than the sum of its proper divisors (24449535760).

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

21302565152 is a wasteful number, since it uses less digits than its factorization.

21302565152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60518672 (or 60518664 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 21302565152 in words is "twenty-one billion, three hundred two million, five hundred sixty-five thousand, one hundred fifty-two".