20888839 has 8 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 20491800.

The previous prime is 20888797. The next prime is 20888863. The reversal of 20888839 is 93888802.

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 20888839 - 2¹¹ = 20886791 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 (20888339) 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, 16354 + ... + 17584.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^20888839 is an apocalyptic number.

20888839 is a deficient number, since it is larger than the sum of its proper divisors (400121).

20888839 is a wasteful number, since it uses less digits than its factorization.

20888839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 20888839 is about 4570.4309424823. The cubic root of 20888839 is about 275.4047549390.

The spelling of 20888839 in words is "twenty million, eight hundred eighty-eight thousand, eight hundred thirty-nine".