18456742 has 8 divisors (see below), whose sum is σ = 27930456. Its totient is φ = 9146592.

The previous prime is 18456727. The next prime is 18456743. The reversal of 18456742 is 24765481.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18456743) 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, 40608 + ... + 41059.

It is an arithmetic number, because the mean of its divisors is an integer number (3491307).

Almost surely, 2^18456742 is an apocalyptic number.

18456742 is a deficient number, since it is larger than the sum of its proper divisors (9473714).

18456742 is a wasteful number, since it uses less digits than its factorization.

18456742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81782.

The product of its digits is 53760, while the sum is 37.

The square root of 18456742 is about 4296.1310501427. The cubic root of 18456742 is about 264.2723219204.

The spelling of 18456742 in words is "eighteen million, four hundred fifty-six thousand, seven hundred forty-two".