20056439 has 8 divisors (see below), whose sum is σ = 21682752. Its totient is φ = 18442080.

The previous prime is 20056433. The next prime is 20056453. The reversal of 20056439 is 93465002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20056439 - 2⁴ = 20056423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (2710344).

Almost surely, 2^20056439 is an apocalyptic number.

20056439 is a deficient number, since it is larger than the sum of its proper divisors (1626313).

20056439 is a wasteful number, since it uses less digits than its factorization.

20056439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20056439 is about 4478.4415816219. The cubic root of 20056439 is about 271.6968535507.

The spelling of 20056439 in words is "twenty million, fifty-six thousand, four hundred thirty-nine".