20383139 has 4 divisors (see below), whose sum is σ = 23295024. Its totient is φ = 17471256.

The previous prime is 20383123. The next prime is 20383141. The reversal of 20383139 is 93138302.

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 20383139 - 2⁴ = 20383123 is a prime.

It is a super-3 number, since 3×20383139³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20383169) 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, 1455932 + ... + 1455945.

It is an arithmetic number, because the mean of its divisors is an integer number (5823756).

Almost surely, 2^20383139 is an apocalyptic number.

20383139 is a deficient number, since it is larger than the sum of its proper divisors (2911885).

20383139 is an equidigital number, since it uses as much as digits as its factorization.

20383139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911884.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20383139 is about 4514.7689863381. The cubic root of 20383139 is about 273.1641416080.

The spelling of 20383139 in words is "twenty million, three hundred eighty-three thousand, one hundred thirty-nine".