20876220391 has 8 divisors (see below), whose sum is σ = 22653704304. Its totient is φ = 19123253760.

The previous prime is 20876220373. The next prime is 20876220419. The reversal of 20876220391 is 19302267802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20876220391 - 2⁵ = 20876220359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20876220311) 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, 6127546 + ... + 6130951.

It is an arithmetic number, because the mean of its divisors is an integer number (2831713038).

Almost surely, 2^20876220391 is an apocalyptic number.

20876220391 is a deficient number, since it is larger than the sum of its proper divisors (1777483913).

20876220391 is a wasteful number, since it uses less digits than its factorization.

20876220391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12258641.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 20876220391 in words is "twenty billion, eight hundred seventy-six million, two hundred twenty thousand, three hundred ninety-one".