18393142 has 4 divisors (see below), whose sum is σ = 27589716. Its totient is φ = 9196570.

The previous prime is 18393131. The next prime is 18393157. The reversal of 18393142 is 24139381.

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

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, 4598284 + ... + 4598287.

It is an arithmetic number, because the mean of its divisors is an integer number (6897429).

Almost surely, 2^18393142 is an apocalyptic number.

18393142 is a deficient number, since it is larger than the sum of its proper divisors (9196574).

18393142 is an equidigital number, since it uses as much as digits as its factorization.

18393142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9196573.

The product of its digits is 5184, while the sum is 31.

The square root of 18393142 is about 4288.7226536581. The cubic root of 18393142 is about 263.9684210008.

The spelling of 18393142 in words is "eighteen million, three hundred ninety-three thousand, one hundred forty-two".