20013657642236 has 12 divisors (see below), whose sum is σ = 35217403089960. Its totient is φ = 9951542473680.

The previous prime is 20013657642233. The next prime is 20013657642239. The reversal of 20013657642236 is 63224675631002.

It is an interprime number because it is at equal distance from previous prime (20013657642233) and next prime (20013657642239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013657642233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13821586046 + ... + 13821587493.

It is an arithmetic number, because the mean of its divisors is an integer number (2934783590830).

Almost surely, 2^{20013657642236} is an apocalyptic number.

It is an amenable number.

20013657642236 is a deficient number, since it is larger than the sum of its proper divisors (15203745447724).

20013657642236 is a wasteful number, since it uses less digits than its factorization.

20013657642236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27643173724 (or 27643173722 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 20013657642236 in words is "twenty trillion, thirteen billion, six hundred fifty-seven million, six hundred forty-two thousand, two hundred thirty-six".