21463642626 has 16 divisors (see below), whose sum is σ = 42932470944. Its totient is φ = 7153683264.

The previous prime is 21463642601. The next prime is 21463642631. The reversal of 21463642626 is 62624636412.

21463642626 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 161191 + ... + 262506.

It is an arithmetic number, because the mean of its divisors is an integer number (2683279434).

Almost surely, 2^21463642626 is an apocalyptic number.

21463642626 is an abundant number, since it is smaller than the sum of its proper divisors (21468828318).

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

21463642626 is a wasteful number, since it uses less digits than its factorization.

21463642626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432145.

The product of its digits is 497664, while the sum is 42.

The spelling of 21463642626 in words is "twenty-one billion, four hundred sixty-three million, six hundred forty-two thousand, six hundred twenty-six".