20136673663251 has 16 divisors (see below), whose sum is σ = 27027047384064. Its totient is φ = 13335632341344.

The previous prime is 20136673663201. The next prime is 20136673663273. The reversal of 20136673663251 is 15236637663102.

It is not a de Polignac number, because 20136673663251 - 2²² = 20136669468947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20136673663194 and 20136673663203.

It is not an unprimeable number, because it can be changed into a prime (20136673663201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31914196 + ... + 32539041.

It is an arithmetic number, because the mean of its divisors is an integer number (1689190461504).

Almost surely, 2^{20136673663251} is an apocalyptic number.

20136673663251 is a deficient number, since it is larger than the sum of its proper divisors (6890373720813).

20136673663251 is a wasteful number, since it uses less digits than its factorization.

20136673663251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64453930.

The product of its (nonzero) digits is 4898880, while the sum is 51.

The spelling of 20136673663251 in words is "twenty trillion, one hundred thirty-six billion, six hundred seventy-three million, six hundred sixty-three thousand, two hundred fifty-one".