20013653172556 has 6 divisors (see below), whose sum is σ = 35023893051980. Its totient is φ = 10006826586276.

The previous prime is 20013653172551. The next prime is 20013653172571. The reversal of 20013653172556 is 65527135631002.

It is a super-2 number, since 2×20013653172556² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20013653172551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501706646566 + ... + 2501706646573.

Almost surely, 2^{20013653172556} is an apocalyptic number.

It is an amenable number.

20013653172556 is a deficient number, since it is larger than the sum of its proper divisors (15010239879424).

20013653172556 is a wasteful number, since it uses less digits than its factorization.

20013653172556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003413293143 (or 5003413293141 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 20013653172556 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, one hundred seventy-two thousand, five hundred fifty-six".