20064631 has 2 divisors, whose sum is σ = 20064632. Its totient is φ = 20064630.

The previous prime is 20064593. The next prime is 20064637. The reversal of 20064631 is 13646002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20064631 - 2¹⁵ = 20031863 is a prime.

It is a super-2 number, since 2×20064631² = 805178834332322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20064637) 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, 10032315 + 10032316.

It is an arithmetic number, because the mean of its divisors is an integer number (10032316).

Almost surely, 2^20064631 is an apocalyptic number.

20064631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20064631 is an equidigital number, since it uses as much as digits as its factorization.

20064631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20064631 is about 4479.3560921186. The cubic root of 20064631 is about 271.7338398050.

The spelling of 20064631 in words is "twenty million, sixty-four thousand, six hundred thirty-one".