20879215507 has 8 divisors (see below), whose sum is σ = 20940030000. Its totient is φ = 20818490784.

The previous prime is 20879215457. The next prime is 20879215543. The reversal of 20879215507 is 70551297802.

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 a de Polignac number, because none of the positive numbers 2^k-20879215507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20879215597) 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, 458244 + ... + 501742.

It is an arithmetic number, because the mean of its divisors is an integer number (2617503750).

Almost surely, 2^20879215507 is an apocalyptic number.

20879215507 is a deficient number, since it is larger than the sum of its proper divisors (60814493).

20879215507 is an equidigital number, since it uses as much as digits as its factorization.

20879215507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44885.

The product of its (nonzero) digits is 352800, while the sum is 46.

The spelling of 20879215507 in words is "twenty billion, eight hundred seventy-nine million, two hundred fifteen thousand, five hundred seven".