21274233462872 has 64 divisors (see below), whose sum is σ = 45507287639520. Its totient is φ = 9236666861568.

The previous prime is 21274233462851. The next prime is 21274233462919. The reversal of 21274233462872 is 27826433247212.

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, 517943 + ... + 6543449.

Almost surely, 2^{21274233462872} 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 21274233462872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22753643819760).

21274233462872 is an abundant number, since it is smaller than the sum of its proper divisors (24233054176648).

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

21274233462872 is a wasteful number, since it uses less digits than its factorization.

21274233462872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027540 (or 6027536 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 53.

The spelling of 21274233462872 in words is "twenty-one trillion, two hundred seventy-four billion, two hundred thirty-three million, four hundred sixty-two thousand, eight hundred seventy-two".