20056839 has 16 divisors (see below), whose sum is σ = 29420544. Its totient is φ = 12153240.

The previous prime is 20056811. The next prime is 20056847. The reversal of 20056839 is 93865002.

It is a happy number.

It is not a de Polignac number, because 20056839 - 2⁵ = 20056807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1482 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (1838784).

Almost surely, 2^20056839 is an apocalyptic number.

20056839 is a deficient number, since it is larger than the sum of its proper divisors (9363705).

20056839 is an equidigital number, since it uses as much as digits as its factorization.

20056839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059 (or 5037 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 20056839 is about 4478.4862397913. The cubic root of 20056839 is about 271.6986597540.

The spelling of 20056839 in words is "twenty million, fifty-six thousand, eight hundred thirty-nine".