12637748220 has 96 divisors (see below), whose sum is σ = 36497212416. Its totient is φ = 3265632000.

The previous prime is 12637748197. The next prime is 12637748239. The reversal of 12637748220 is 2284773621.

It is a happy number.

It is a super-2 number, since 2×12637748220² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262635 + ... + 307005.

It is an arithmetic number, because the mean of its divisors is an integer number (380179296).

Almost surely, 2^12637748220 is an apocalyptic number.

12637748220 is a gapful number since it is divisible by the number (10) 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 12637748220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18248606208).

12637748220 is an abundant number, since it is smaller than the sum of its proper divisors (23859464196).

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

12637748220 is a wasteful number, since it uses less digits than its factorization.

12637748220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44531 (or 44529 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 12637748220 in words is "twelve billion, six hundred thirty-seven million, seven hundred forty-eight thousand, two hundred twenty".