20698943 has 2 divisors, whose sum is σ = 20698944. Its totient is φ = 20698942.

The previous prime is 20698939. The next prime is 20698949. The reversal of 20698943 is 34989602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20698943 - 2² = 20698939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20698943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20698949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349471 + 10349472.

It is an arithmetic number, because the mean of its divisors is an integer number (10349472).

Almost surely, 2^20698943 is an apocalyptic number.

20698943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698943 is an equidigital number, since it uses as much as digits as its factorization.

20698943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 20698943 is about 4549.6091040880. The cubic root of 20698943 is about 274.5676644705.

The spelling of 20698943 in words is "twenty million, six hundred ninety-eight thousand, nine hundred forty-three".