20339518 has 4 divisors (see below), whose sum is σ = 30509280. Its totient is φ = 10169758.

The previous prime is 20339491. The next prime is 20339533. The reversal of 20339518 is 81593302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20339518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5084878 + ... + 5084881.

It is an arithmetic number, because the mean of its divisors is an integer number (7627320).

Almost surely, 2^20339518 is an apocalyptic number.

20339518 is a deficient number, since it is larger than the sum of its proper divisors (10169762).

20339518 is a wasteful number, since it uses less digits than its factorization.

20339518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10169761.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20339518 is about 4509.9354762568. The cubic root of 20339518 is about 272.9691405139.

The spelling of 20339518 in words is "twenty million, three hundred thirty-nine thousand, five hundred eighteen".