20698453 has 2 divisors, whose sum is σ = 20698454. Its totient is φ = 20698452.

The previous prime is 20698397. The next prime is 20698477. The reversal of 20698453 is 35489602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11444689 + 9253764 = 3383^2 + 3042^2 .

It is a cyclic number.

It is not a de Polignac number, because 20698453 - 2¹³ = 20690261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20698253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349226 + 10349227.

It is an arithmetic number, because the mean of its divisors is an integer number (10349227).

Almost surely, 2^20698453 is an apocalyptic number.

It is an amenable number.

20698453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698453 is an equidigital number, since it uses as much as digits as its factorization.

20698453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20698453 is about 4549.5552529890. Note that the first 3 decimals coincide. The cubic root of 20698453 is about 274.5654978669.

The spelling of 20698453 in words is "twenty million, six hundred ninety-eight thousand, four hundred fifty-three".