20102339 has 6 divisors (see below), whose sum is σ = 20253996. Its totient is φ = 19951500.

The previous prime is 20102321. The next prime is 20102389. The reversal of 20102339 is 93320102.

It is not a de Polignac number, because 20102339 - 2²⁰ = 19053763 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 20102339.

It is not an unprimeable number, because it can be changed into a prime (20102309) 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 5 ways as a sum of consecutive naturals, for example, 70892 + ... + 71174.

It is an arithmetic number, because the mean of its divisors is an integer number (3375666).

Almost surely, 2^20102339 is an apocalyptic number.

20102339 is a deficient number, since it is larger than the sum of its proper divisors (151657).

20102339 is an frugal number, since it uses more digits than its factorization.

20102339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20102339 is about 4483.5632035246. The cubic root of 20102339 is about 271.9039588478.

The spelling of 20102339 in words is "twenty million, one hundred two thousand, three hundred thirty-nine".