20032439 has 4 divisors (see below), whose sum is σ = 22894224. Its totient is φ = 17170656.

The previous prime is 20032423. The next prime is 20032457. The reversal of 20032439 is 93423002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20032439 - 2⁴ = 20032423 is a prime.

It is a super-2 number, since 2×20032439² = 802597224577442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430882 + ... + 1430895.

It is an arithmetic number, because the mean of its divisors is an integer number (5723556).

Almost surely, 2^20032439 is an apocalyptic number.

20032439 is a deficient number, since it is larger than the sum of its proper divisors (2861785).

20032439 is an equidigital number, since it uses as much as digits as its factorization.

20032439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861784.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20032439 is about 4475.7612760289. The cubic root of 20032439 is about 271.5884373763.

The spelling of 20032439 in words is "twenty million, thirty-two thousand, four hundred thirty-nine".