20671611117157 has 32 divisors (see below), whose sum is σ = 28345420099584. Its totient is φ = 14552336145600.

The previous prime is 20671611117133. The next prime is 20671611117167. The reversal of 20671611117157 is 75171111617602.

It is not a de Polignac number, because 20671611117157 - 2¹¹ = 20671611115109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20671611117167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219644019 + ... + 219738112.

It is an arithmetic number, because the mean of its divisors is an integer number (885794378112).

Almost surely, 2^{20671611117157} is an apocalyptic number.

It is an amenable number.

20671611117157 is a deficient number, since it is larger than the sum of its proper divisors (7673808982427).

20671611117157 is a wasteful number, since it uses less digits than its factorization.

20671611117157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439382209.

The product of its (nonzero) digits is 123480, while the sum is 46.

The spelling of 20671611117157 in words is "twenty trillion, six hundred seventy-one billion, six hundred eleven million, one hundred seventeen thousand, one hundred fifty-seven".