20464351 has 2 divisors, whose sum is σ = 20464352. Its totient is φ = 20464350.

The previous prime is 20464337. The next prime is 20464357. The reversal of 20464351 is 15346402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20464351 - 2²¹ = 18367199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20464357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232175 + 10232176.

It is an arithmetic number, because the mean of its divisors is an integer number (10232176).

Almost surely, 2^20464351 is an apocalyptic number.

20464351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20464351 is an equidigital number, since it uses as much as digits as its factorization.

20464351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20464351 is about 4523.7540826177. The cubic root of 20464351 is about 273.5264477386.

The spelling of 20464351 in words is "twenty million, four hundred sixty-four thousand, three hundred fifty-one".