21264446192 has 80 divisors (see below), whose sum is σ = 47650423392. Its totient is φ = 9085378560.

The previous prime is 21264446191. The next prime is 21264446233. The reversal of 21264446192 is 29164446212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21264446191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2559998 + ... + 2568290.

Almost surely, 2^21264446192 is an apocalyptic number.

21264446192 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21264446192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23825211696).

21264446192 is an abundant number, since it is smaller than the sum of its proper divisors (26385977200).

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

21264446192 is a wasteful number, since it uses less digits than its factorization.

21264446192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9186 (or 9180 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The spelling of 21264446192 in words is "twenty-one billion, two hundred sixty-four million, four hundred forty-six thousand, one hundred ninety-two".