20330639 has 8 divisors (see below), whose sum is σ = 23709600. Its totient is φ = 17425968.

The previous prime is 20330591. The next prime is 20330647. The reversal of 20330639 is 93603302.

It is not a de Polignac number, because 20330639 - 2²⁴ = 3553423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330339) 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 in 7 ways as a sum of consecutive naturals, for example, 29294 + ... + 29979.

It is an arithmetic number, because the mean of its divisors is an integer number (2963700).

Almost surely, 2^20330639 is an apocalyptic number.

20330639 is a deficient number, since it is larger than the sum of its proper divisors (3378961).

20330639 is an frugal number, since it uses more digits than its factorization.

20330639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59294 (or 59280 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

The square root of 20330639 is about 4508.9509866487. The cubic root of 20330639 is about 272.9294141421.

The spelling of 20330639 in words is "twenty million, three hundred thirty thousand, six hundred thirty-nine".