21013501422 has 16 divisors (see below), whose sum is σ = 42044376960. Its totient is φ = 7001604792.

The previous prime is 21013501387. The next prime is 21013501447. The reversal of 21013501422 is 22410531012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708172 + ... + 737247.

It is an arithmetic number, because the mean of its divisors is an integer number (2627773560).

Almost surely, 2^21013501422 is an apocalyptic number.

21013501422 is an abundant number, since it is smaller than the sum of its proper divisors (21030875538).

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

21013501422 is a wasteful number, since it uses less digits than its factorization.

21013501422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447847.

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 21013501422 in words is "twenty-one billion, thirteen million, five hundred one thousand, four hundred twenty-two".