21620269112 has 64 divisors (see below), whose sum is σ = 46262664000. Its totient is φ = 9383823360.

The previous prime is 21620269079. The next prime is 21620269141. The reversal of 21620269112 is 21196202612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2469062 + ... + 2477802.

It is an arithmetic number, because the mean of its divisors is an integer number (722854125).

Almost surely, 2^21620269112 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 21620269112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23131332000).

21620269112 is an abundant number, since it is smaller than the sum of its proper divisors (24642394888).

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

21620269112 is a wasteful number, since it uses less digits than its factorization.

21620269112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10176 (or 10172 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 21620269112 in words is "twenty-one billion, six hundred twenty million, two hundred sixty-nine thousand, one hundred twelve".