20110439 has 4 divisors (see below), whose sum is σ = 21293424. Its totient is φ = 18927456.

The previous prime is 20110429. The next prime is 20110481. The reversal of 20110439 is 93401102.

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 20110439 - 2⁸ = 20110183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20110439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110429) 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, 591467 + ... + 591500.

It is an arithmetic number, because the mean of its divisors is an integer number (5323356).

Almost surely, 2^20110439 is an apocalyptic number.

20110439 is a deficient number, since it is larger than the sum of its proper divisors (1182985).

20110439 is a wasteful number, since it uses less digits than its factorization.

20110439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182984.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20110439 is about 4484.4664119603. The cubic root of 20110439 is about 271.9404741063.

The spelling of 20110439 in words is "twenty million, one hundred ten thousand, four hundred thirty-nine".