20698211 has 2 divisors, whose sum is σ = 20698212. Its totient is φ = 20698210.

The previous prime is 20698169. The next prime is 20698217. The reversal of 20698211 is 11289602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20698211 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20698217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349105 + 10349106.

It is an arithmetic number, because the mean of its divisors is an integer number (10349106).

Almost surely, 2^20698211 is an apocalyptic number.

20698211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698211 is an equidigital number, since it uses as much as digits as its factorization.

20698211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 20698211 is about 4549.5286569050. The cubic root of 20698211 is about 274.5644278173.

The spelling of 20698211 in words is "twenty million, six hundred ninety-eight thousand, two hundred eleven".