20698933 has 2 divisors, whose sum is σ = 20698934. Its totient is φ = 20698932.

The previous prime is 20698883. The next prime is 20698939. The reversal of 20698933 is 33989602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20629764 + 69169 = 4542^2 + 263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20698933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20698939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349466 + 10349467.

It is an arithmetic number, because the mean of its divisors is an integer number (10349467).

Almost surely, 2^20698933 is an apocalyptic number.

It is an amenable number.

20698933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698933 is an equidigital number, since it uses as much as digits as its factorization.

20698933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20698933 is about 4549.6080050923. The cubic root of 20698933 is about 274.5676202545.

The spelling of 20698933 in words is "twenty million, six hundred ninety-eight thousand, nine hundred thirty-three".