20698579387 has 2 divisors, whose sum is σ = 20698579388. Its totient is φ = 20698579386.

The previous prime is 20698579357. The next prime is 20698579399. The reversal of 20698579387 is 78397589602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20698579387 - 2¹⁵ = 20698546619 is a prime.

It is not a weakly prime, because it can be changed into another prime (20698579327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349289693 + 10349289694.

It is an arithmetic number, because the mean of its divisors is an integer number (10349289694).

Almost surely, 2^20698579387 is an apocalyptic number.

20698579387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698579387 is an equidigital number, since it uses as much as digits as its factorization.

20698579387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 20698579387 in words is "twenty billion, six hundred ninety-eight million, five hundred seventy-nine thousand, three hundred eighty-seven".