21325664127602 has 16 divisors (see below), whose sum is σ = 33985913943960. Its totient is φ = 10016900949888.

The previous prime is 21325664127601. The next prime is 21325664127637. The reversal of 21325664127602 is 20672146652312.

It can be written as a sum of positive squares in 4 ways, for example, as 20767716379921 + 557947747681 = 4557161^2 + 746959^2 .

It is not an unprimeable number, because it can be changed into a prime (21325664127601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4968698723 + ... + 4968703014.

Almost surely, 2^{21325664127602} is an apocalyptic number.

21325664127602 is a deficient number, since it is larger than the sum of its proper divisors (12660249816358).

21325664127602 is a wasteful number, since it uses less digits than its factorization.

21325664127602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9937401805.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 21325664127602 in words is "twenty-one trillion, three hundred twenty-five billion, six hundred sixty-four million, one hundred twenty-seven thousand, six hundred two".