20698389 has 16 divisors (see below), whose sum is σ = 30757440. Its totient is φ = 13757040.

The previous prime is 20698387. The next prime is 20698397. The reversal of 20698389 is 98389602.

It is not a de Polignac number, because 20698389 - 2¹ = 20698387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9754 + ... + 11684.

It is an arithmetic number, because the mean of its divisors is an integer number (1922340).

Almost surely, 2^20698389 is an apocalyptic number.

It is an amenable number.

20698389 is a deficient number, since it is larger than the sum of its proper divisors (10059051).

20698389 is a wasteful number, since it uses less digits than its factorization.

20698389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2331 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 20698389 is about 4549.5482193290. The cubic root of 20698389 is about 274.5652148794.

The spelling of 20698389 in words is "twenty million, six hundred ninety-eight thousand, three hundred eighty-nine".