20017835379 has 24 divisors (see below), whose sum is σ = 29335628192. Its totient is φ = 13151237760.

The previous prime is 20017835317. The next prime is 20017835381. The reversal of 20017835379 is 97353871002.

It is a happy number.

20017835379 is a `hidden beast` number, since 20 + 0 + 17 + 83 + 537 + 9 = 666.

It is not a de Polignac number, because 20017835379 - 2¹¹ = 20017833331 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20017835309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 800394 + ... + 825024.

Almost surely, 2^20017835379 is an apocalyptic number.

20017835379 is a deficient number, since it is larger than the sum of its proper divisors (9317792813).

20017835379 is a wasteful number, since it uses less digits than its factorization.

20017835379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25947 (or 25944 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 20017835379 in words is "twenty billion, seventeen million, eight hundred thirty-five thousand, three hundred seventy-nine".