18442253 has 4 divisors (see below), whose sum is σ = 18621408. Its totient is φ = 18263100.

The previous prime is 18442247. The next prime is 18442337. The reversal of 18442253 is 35224481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18442253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442213) 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, 89423 + ... + 89628.

It is an arithmetic number, because the mean of its divisors is an integer number (4655352).

Almost surely, 2^18442253 is an apocalyptic number.

It is an amenable number.

18442253 is a deficient number, since it is larger than the sum of its proper divisors (179155).

18442253 is a wasteful number, since it uses less digits than its factorization.

18442253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179154.

The product of its digits is 7680, while the sum is 29.

The square root of 18442253 is about 4294.4444343826. Note that the first 4 decimals coincide. The cubic root of 18442253 is about 264.2031503755.

The spelling of 18442253 in words is "eighteen million, four hundred forty-two thousand, two hundred fifty-three".