20516317114557 has 8 divisors (see below), whose sum is σ = 29841915803040. Its totient is φ = 12434131584560.

The previous prime is 20516317114549. The next prime is 20516317114577. The reversal of 20516317114557 is 75541171361502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20516317114557 - 2³ = 20516317114549 is a prime.

It is a super-2 number, since 2×20516317114557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516317114577) 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 7 ways as a sum of consecutive naturals, for example, 310853289582 + ... + 310853289647.

It is an arithmetic number, because the mean of its divisors is an integer number (3730239475380).

Almost surely, 2^{20516317114557} is an apocalyptic number.

It is an amenable number.

20516317114557 is a deficient number, since it is larger than the sum of its proper divisors (9325598688483).

20516317114557 is a wasteful number, since it uses less digits than its factorization.

20516317114557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621706579243.

The product of its (nonzero) digits is 882000, while the sum is 48.

The spelling of 20516317114557 in words is "twenty trillion, five hundred sixteen billion, three hundred seventeen million, one hundred fourteen thousand, five hundred fifty-seven".