21426605106 has 16 divisors (see below), whose sum is σ = 43849797024. Its totient is φ = 6976103904.

The previous prime is 21426605099. The next prime is 21426605107. The reversal of 21426605106 is 60150662412.

It is not an unprimeable number, because it can be changed into a prime (21426605107) 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, 41524171 + ... + 41524686.

It is an arithmetic number, because the mean of its divisors is an integer number (2740612314).

Almost surely, 2^21426605106 is an apocalyptic number.

21426605106 is an abundant number, since it is smaller than the sum of its proper divisors (22423191918).

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

21426605106 is a wasteful number, since it uses less digits than its factorization.

21426605106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83048905.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21426605106 in words is "twenty-one billion, four hundred twenty-six million, six hundred five thousand, one hundred six".