20746610554957 has 16 divisors (see below), whose sum is σ = 24158035278720. Its totient is φ = 17447098773312.

The previous prime is 20746610554939. The next prime is 20746610555053. The reversal of 20746610554957 is 75945501664702.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20746610554957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20746610554895 and 20746610554904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746610554457) 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 15 ways as a sum of consecutive naturals, for example, 43187794 + ... + 43665532.

It is an arithmetic number, because the mean of its divisors is an integer number (1509877204920).

Almost surely, 2^{20746610554957} is an apocalyptic number.

It is an amenable number.

20746610554957 is a deficient number, since it is larger than the sum of its proper divisors (3411424723763).

20746610554957 is a wasteful number, since it uses less digits than its factorization.

20746610554957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594852.

The product of its (nonzero) digits is 63504000, while the sum is 61.

The spelling of 20746610554957 in words is "twenty trillion, seven hundred forty-six billion, six hundred ten million, five hundred fifty-four thousand, nine hundred fifty-seven".