20873368641 has 16 divisors (see below), whose sum is σ = 29065666176. Its totient is φ = 13299344256.

The previous prime is 20873368639. The next prime is 20873368679. The reversal of 20873368641 is 14686337802.

It is not a de Polignac number, because 20873368641 - 2¹ = 20873368639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20873358641) 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, 44470 + ... + 209103.

It is an arithmetic number, because the mean of its divisors is an integer number (1816604136).

Almost surely, 2^20873368641 is an apocalyptic number.

It is an amenable number.

20873368641 is a deficient number, since it is larger than the sum of its proper divisors (8192297535).

20873368641 is a wasteful number, since it uses less digits than its factorization.

20873368641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254792.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 20873368641 in words is "twenty billion, eight hundred seventy-three million, three hundred sixty-eight thousand, six hundred forty-one".