20953351 has 2 divisors, whose sum is σ = 20953352. Its totient is φ = 20953350.

The previous prime is 20953321. The next prime is 20953363. The reversal of 20953351 is 15335902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20953351 - 2⁷ = 20953223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20953301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10476675 + 10476676.

It is an arithmetic number, because the mean of its divisors is an integer number (10476676).

Almost surely, 2^20953351 is an apocalyptic number.

20953351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20953351 is an equidigital number, since it uses as much as digits as its factorization.

20953351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 20953351 is about 4577.4830420221. The cubic root of 20953351 is about 275.6879787973.

The spelling of 20953351 in words is "twenty million, nine hundred fifty-three thousand, three hundred fifty-one".