21603162242624 has 56 divisors (see below), whose sum is σ = 44347851588600. Its totient is φ = 10428914585600.

The previous prime is 21603162242587. The next prime is 21603162242657. The reversal of 21603162242624 is 42624226130612.

It can be written as a sum of positive squares in 4 ways, for example, as 129576961024 + 21473585281600 = 359968^2 + 4633960^2 .

It is a super-2 number, since 2×21603162242624² (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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159921542 + ... + 160056570.

It is an arithmetic number, because the mean of its divisors is an integer number (791925921225).

Almost surely, 2^{21603162242624} is an apocalyptic number.

It is an amenable number.

21603162242624 is an abundant number, since it is smaller than the sum of its proper divisors (22744689345976).

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

21603162242624 is a wasteful number, since it uses less digits than its factorization.

21603162242624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221271 (or 221261 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 21603162242624 in words is "twenty-one trillion, six hundred three billion, one hundred sixty-two million, two hundred forty-two thousand, six hundred twenty-four".