20631251251452 has 48 divisors (see below), whose sum is σ = 48860624782592. Its totient is φ = 6774088907520.

The previous prime is 20631251251441. The next prime is 20631251251483. The reversal of 20631251251452 is 25415215213602.

It is a super-2 number, since 2×20631251251452² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20631251251452.

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, 15056052 + ... + 16369092.

Almost surely, 2^{20631251251452} is an apocalyptic number.

It is an amenable number.

20631251251452 is an abundant number, since it is smaller than the sum of its proper divisors (28229373531140).

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

20631251251452 is a wasteful number, since it uses less digits than its factorization.

20631251251452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332658 (or 1332656 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 20631251251452 in words is "twenty trillion, six hundred thirty-one billion, two hundred fifty-one million, two hundred fifty-one thousand, four hundred fifty-two".