18345742 has 8 divisors (see below), whose sum is σ = 27786096. Its totient is φ = 9083712.

The previous prime is 18345731. The next prime is 18345781. The reversal of 18345742 is 24754381.

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

It is a junction number, because it is equal to n+sod(n) for n = 18345698 and 18345707.

It is a congruent number.

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, 44323 + ... + 44734.

It is an arithmetic number, because the mean of its divisors is an integer number (3473262).

Almost surely, 2^18345742 is an apocalyptic number.

18345742 is a deficient number, since it is larger than the sum of its proper divisors (9440354).

18345742 is a wasteful number, since it uses less digits than its factorization.

18345742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89162.

The product of its digits is 26880, while the sum is 34.

The square root of 18345742 is about 4283.1929678687. The cubic root of 18345742 is about 263.7414728868.

The spelling of 18345742 in words is "eighteen million, three hundred forty-five thousand, seven hundred forty-two".