12638220374 has 16 divisors (see below), whose sum is σ = 20423521440. Its totient is φ = 5830757760.

The previous prime is 12638220373. The next prime is 12638220403. The reversal of 12638220374 is 47302283621.

It is a super-2 number, since 2×12638220374² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638220373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25322 + ... + 160989.

It is an arithmetic number, because the mean of its divisors is an integer number (1276470090).

Almost surely, 2^12638220374 is an apocalyptic number.

12638220374 is a deficient number, since it is larger than the sum of its proper divisors (7785301066).

12638220374 is a wasteful number, since it uses less digits than its factorization.

12638220374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188935.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 12638220374 in words is "twelve billion, six hundred thirty-eight million, two hundred twenty thousand, three hundred seventy-four".