20972688960073 has 8 divisors (see below), whose sum is σ = 21695960337480. Its totient is φ = 20249422596480.

The previous prime is 20972688960029. The next prime is 20972688960109. The reversal of 20972688960073 is 37006988627902.

It can be written as a sum of positive squares in 4 ways, for example, as 10576726787344 + 10395962172729 = 3252188^2 + 3224277^2 .

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 20972688960073 - 2³³ = 20964099025481 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20972688959990 and 20972688960008.

It is not an unprimeable number, because it can be changed into a prime (20972688960973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8558763 + ... + 10733023.

It is an arithmetic number, because the mean of its divisors is an integer number (2711995042185).

Almost surely, 2^{20972688960073} is an apocalyptic number.

It is an amenable number.

20972688960073 is a deficient number, since it is larger than the sum of its proper divisors (723271377407).

20972688960073 is a wasteful number, since it uses less digits than its factorization.

20972688960073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506907.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 20972688960073 in words is "twenty trillion, nine hundred seventy-two billion, six hundred eighty-eight million, nine hundred sixty thousand, seventy-three".