21300610422 has 64 divisors (see below), whose sum is σ = 52698691584. Its totient is φ = 5589198720.

The previous prime is 21300610363. The next prime is 21300610447. The reversal of 21300610422 is 22401600312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8547 + ... + 206577.

It is an arithmetic number, because the mean of its divisors is an integer number (823417056).

Almost surely, 2^21300610422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300610422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26349345792).

21300610422 is an abundant number, since it is smaller than the sum of its proper divisors (31398081162).

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

21300610422 is a wasteful number, since it uses less digits than its factorization.

21300610422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198253.

The product of its (nonzero) digits is 576, while the sum is 21.

The spelling of 21300610422 in words is "twenty-one billion, three hundred million, six hundred ten thousand, four hundred twenty-two".