21150163165352 has 64 divisors (see below), whose sum is σ = 43863239389200. Its totient is φ = 9497367521280.

The previous prime is 21150163165343. The next prime is 21150163165367. The reversal of 21150163165352 is 25356136105112.

It can be written as a sum of positive squares in 8 ways, for example, as 16347902908516 + 4802260256836 = 4043254^2 + 2191406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97326674 + ... + 97543742.

Almost surely, 2^{21150163165352} is an apocalyptic number.

It is an amenable number.

21150163165352 is an abundant number, since it is smaller than the sum of its proper divisors (22713076223848).

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

21150163165352 is a wasteful number, since it uses less digits than its factorization.

21150163165352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242446 (or 242442 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 21150163165352 in words is "twenty-one trillion, one hundred fifty billion, one hundred sixty-three million, one hundred sixty-five thousand, three hundred fifty-two".