21463662625002 has 144 divisors (see below), whose sum is σ = 53477495037720. Its totient is φ = 6197271994368.

The previous prime is 21463662624967. The next prime is 21463662625033. The reversal of 21463662625002 is 20052626636412.

21463662625002 is a `hidden beast` number, since 2 + 1 + 4 + 63 + 66 + 26 + 2 + 500 + 2 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 288378666081 + 21175283958921 = 537009^2 + 4601661^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16811824 + ... + 18043412.

Almost surely, 2^{21463662625002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21463662625002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26738747518860).

21463662625002 is an abundant number, since it is smaller than the sum of its proper divisors (32013832412718).

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

21463662625002 is a wasteful number, since it uses less digits than its factorization.

21463662625002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231977 (or 1231961 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 21463662625002 in words is "twenty-one trillion, four hundred sixty-three billion, six hundred sixty-two million, six hundred twenty-five thousand, two".