18270442 has 8 divisors (see below), whose sum is σ = 28043136. Its totient is φ = 8922732.

The previous prime is 18270437. The next prime is 18270463. The reversal of 18270442 is 24407281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18270442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106138 + ... + 106309.

It is an arithmetic number, because the mean of its divisors is an integer number (3505392).

Almost surely, 2^18270442 is an apocalyptic number.

18270442 is a deficient number, since it is larger than the sum of its proper divisors (9772694).

18270442 is a wasteful number, since it uses less digits than its factorization.

18270442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212492.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 18270442 is about 4274.3937581837. The cubic root of 18270442 is about 263.3801362448.

The spelling of 18270442 in words is "eighteen million, two hundred seventy thousand, four hundred forty-two".