20116170431761 has 4 divisors (see below), whose sum is σ = 20133117501552. Its totient is φ = 20099223361972.

The previous prime is 20116170431737. The next prime is 20116170431771. The reversal of 20116170431761 is 16713407161102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20116170431761 - 2³⁷ = 19978731478289 is a prime.

It is a super-2 number, since 2×20116170431761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116170431771) 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, 8473533115 + ... + 8473535488.

It is an arithmetic number, because the mean of its divisors is an integer number (5033279375388).

Almost surely, 2^{20116170431761} is an apocalyptic number.

It is an amenable number.

20116170431761 is a deficient number, since it is larger than the sum of its proper divisors (16947069791).

20116170431761 is a wasteful number, since it uses less digits than its factorization.

20116170431761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16947069790.

The product of its (nonzero) digits is 42336, while the sum is 40.

Adding to 20116170431761 its reverse (16713407161102), we get a palindrome (36829577592863).

The spelling of 20116170431761 in words is "twenty trillion, one hundred sixteen billion, one hundred seventy million, four hundred thirty-one thousand, seven hundred sixty-one".