18152939 has 4 divisors (see below), whose sum is σ = 20746224. Its totient is φ = 15559656.

The previous prime is 18152933. The next prime is 18152941. The reversal of 18152939 is 93925181.

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

It is not a de Polignac number, because 18152939 - 2²⁴ = 1375723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18152933) 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, 1296632 + ... + 1296645.

It is an arithmetic number, because the mean of its divisors is an integer number (5186556).

Almost surely, 2^18152939 is an apocalyptic number.

18152939 is a deficient number, since it is larger than the sum of its proper divisors (2593285).

18152939 is an equidigital number, since it uses as much as digits as its factorization.

18152939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593284.

The product of its digits is 19440, while the sum is 38.

The square root of 18152939 is about 4260.6265971099. The cubic root of 18152939 is about 262.8142944407.

It can be divided in two parts, 18152 and 939, that added together give a palindrome (19091).

The spelling of 18152939 in words is "eighteen million, one hundred fifty-two thousand, nine hundred thirty-nine".