21370874112 has 864 divisors, whose sum is σ = 80250710400. Its totient is φ = 5643509760.

The previous prime is 21370874101. The next prime is 21370874137. The reversal of 21370874112 is 21147807312.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 521240812 + ... + 521240852.

Almost surely, 2^21370874112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21370874112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40125355200).

21370874112 is an abundant number, since it is smaller than the sum of its proper divisors (58879836288).

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

21370874112 is an frugal number, since it uses more digits than its factorization.

21370874112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 21370874112 in words is "twenty-one billion, three hundred seventy million, eight hundred seventy-four thousand, one hundred twelve".