20931001888319 has 8 divisors (see below), whose sum is σ = 20939811335520. Its totient is φ = 20922194304000.

The previous prime is 20931001888267. The next prime is 20931001888351. The reversal of 20931001888319 is 91388810013902.

It is a happy number.

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 20931001888319 - 2²⁴ = 20930985111103 is a prime.

It is a super-2 number, since 2×20931001888319² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20931001881319) 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, 22242974 + ... + 23164884.

It is an arithmetic number, because the mean of its divisors is an integer number (2617476416940).

Almost surely, 2^{20931001888319} is an apocalyptic number.

20931001888319 is a deficient number, since it is larger than the sum of its proper divisors (8809447201).

20931001888319 is an equidigital number, since it uses as much as digits as its factorization.

20931001888319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931441.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 20931001888319 in words is "twenty trillion, nine hundred thirty-one billion, one million, eight hundred eighty-eight thousand, three hundred nineteen".