20953861017339 has 16 divisors (see below), whose sum is σ = 27970408120320. Its totient is φ = 13953285178560.

The previous prime is 20953861017211. The next prime is 20953861017367. The reversal of 20953861017339 is 93371016835902.

It is not a de Polignac number, because 20953861017339 - 2⁷ = 20953861017211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20953861017389) 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, 9672094 + ... + 11638604.

It is an arithmetic number, because the mean of its divisors is an integer number (1748150507520).

Almost surely, 2^{20953861017339} is an apocalyptic number.

20953861017339 is a deficient number, since it is larger than the sum of its proper divisors (7016547102981).

20953861017339 is a wasteful number, since it uses less digits than its factorization.

20953861017339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970570.

The product of its (nonzero) digits is 7348320, while the sum is 57.

The spelling of 20953861017339 in words is "twenty trillion, nine hundred fifty-three billion, eight hundred sixty-one million, seventeen thousand, three hundred thirty-nine".