21312321147648 has 108 divisors (see below), whose sum is σ = 61449956113728. Its totient is φ = 7103959050240.

The previous prime is 21312321147647. The next prime is 21312321147653. The reversal of 21312321147648 is 84674112321312.

21312321147648 is a `hidden beast` number, since 2 + 1 + 3 + 123 + 2 + 11 + 476 + 48 = 666.

It is not an unprimeable number, because it can be changed into a prime (21312321147647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208523118 + ... + 208625298.

Almost surely, 2^{21312321147648} is an apocalyptic number.

It is an amenable number.

21312321147648 is an abundant number, since it is smaller than the sum of its proper divisors (40137634966080).

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

21312321147648 is a wasteful number, since it uses less digits than its factorization.

21312321147648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192730 (or 192713 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 21312321147648 in words is "twenty-one trillion, three hundred twelve billion, three hundred twenty-one million, one hundred forty-seven thousand, six hundred forty-eight".