20339889 has 8 divisors (see below), whose sum is σ = 28299072. Its totient is φ = 12970320.

The previous prime is 20339857. The next prime is 20339909. The reversal of 20339889 is 98893302.

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

It is not a de Polignac number, because 20339889 - 2⁵ = 20339857 is a prime.

It is a super-2 number, since 2×20339889² = 827422169064642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20339889.

It is not an unprimeable number, because it can be changed into a prime (20339819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147322 + ... + 147459.

It is an arithmetic number, because the mean of its divisors is an integer number (3537384).

Almost surely, 2^20339889 is an apocalyptic number.

It is an amenable number.

20339889 is a deficient number, since it is larger than the sum of its proper divisors (7959183).

20339889 is a wasteful number, since it uses less digits than its factorization.

20339889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294807.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 20339889 is about 4509.9766074781. The cubic root of 20339889 is about 272.9708001884.

The spelling of 20339889 in words is "twenty million, three hundred thirty-nine thousand, eight hundred eighty-nine".