21630157552250 has 64 divisors (see below), whose sum is σ = 43704834840576. Its totient is φ = 7968490920000.

The previous prime is 21630157552193. The next prime is 21630157552277. The reversal of 21630157552250 is 5225575103612.

It is a happy number.

It is a super-2 number, since 2×21630157552250² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6072026 + ... + 8951525.

It is an arithmetic number, because the mean of its divisors is an integer number (682888044384).

Almost surely, 2^{21630157552250} is an apocalyptic number.

21630157552250 is an abundant number, since it is smaller than the sum of its proper divisors (22074677288326).

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

21630157552250 is a wasteful number, since it uses less digits than its factorization.

21630157552250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15024024 (or 15024014 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 21630157552250 in words is "twenty-one trillion, six hundred thirty billion, one hundred fifty-seven million, five hundred fifty-two thousand, two hundred fifty".