21425764002 has 16 divisors (see below), whose sum is σ = 42866882112. Its totient is φ = 7139362320.

The previous prime is 21425764001. The next prime is 21425764007. The reversal of 21425764002 is 20046752412.

It is not an unprimeable number, because it can be changed into a prime (21425764001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621574 + ... + 655137.

It is an arithmetic number, because the mean of its divisors is an integer number (2679180132).

Almost surely, 2^21425764002 is an apocalyptic number.

21425764002 is an abundant number, since it is smaller than the sum of its proper divisors (21441118110).

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

21425764002 is a wasteful number, since it uses less digits than its factorization.

21425764002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279513.

The product of its (nonzero) digits is 26880, while the sum is 33.

The spelling of 21425764002 in words is "twenty-one billion, four hundred twenty-five million, seven hundred sixty-four thousand, two".