20359939 has 4 divisors (see below), whose sum is σ = 20383200. Its totient is φ = 20336680.

The previous prime is 20359891. The next prime is 20359951. The reversal of 20359939 is 93995302.

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 20359939 - 2²¹ = 18262787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20353939) 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, 10264 + ... + 12085.

It is an arithmetic number, because the mean of its divisors is an integer number (5095800).

Almost surely, 2^20359939 is an apocalyptic number.

20359939 is a deficient number, since it is larger than the sum of its proper divisors (23261).

20359939 is an equidigital number, since it uses as much as digits as its factorization.

20359939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23260.

The product of its (nonzero) digits is 65610, while the sum is 40.

The square root of 20359939 is about 4512.1989096227. The cubic root of 20359939 is about 273.0604641843.

The spelling of 20359939 in words is "twenty million, three hundred fifty-nine thousand, nine hundred thirty-nine".