20692253 has 2 divisors, whose sum is σ = 20692254. Its totient is φ = 20692252.

The previous prime is 20692241. The next prime is 20692261. The reversal of 20692253 is 35229602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 3161284 = 4187^2 + 1778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20692253 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20692223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10346126 + 10346127.

It is an arithmetic number, because the mean of its divisors is an integer number (10346127).

Almost surely, 2^20692253 is an apocalyptic number.

It is an amenable number.

20692253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20692253 is an equidigital number, since it uses as much as digits as its factorization.

20692253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20692253 is about 4548.8738166716. The cubic root of 20692253 is about 274.5380807440.

The spelling of 20692253 in words is "twenty million, six hundred ninety-two thousand, two hundred fifty-three".