21357007365252 has 48 divisors (see below), whose sum is σ = 53671813466432. Its totient is φ = 6570714971520.

The previous prime is 21357007365247. The next prime is 21357007365263. The reversal of 21357007365252 is 25256370075312.

It is a super-2 number, since 2×21357007365252² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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, 5467399 + ... + 8520942.

Almost surely, 2^{21357007365252} is an apocalyptic number.

It is an amenable number.

21357007365252 is an abundant number, since it is smaller than the sum of its proper divisors (32314806101180).

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

21357007365252 is a wasteful number, since it uses less digits than its factorization.

21357007365252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13998148 (or 13998146 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 21357007365252 in words is "twenty-one trillion, three hundred fifty-seven billion, seven million, three hundred sixty-five thousand, two hundred fifty-two".