18342872 has 8 divisors (see below), whose sum is σ = 34392900. Its totient is φ = 9171432.

The previous prime is 18342871. The next prime is 18342887. The reversal of 18342872 is 27824381.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18342871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1146422 + ... + 1146437.

Almost surely, 2^18342872 is an apocalyptic number.

It is an amenable number.

18342872 is a deficient number, since it is larger than the sum of its proper divisors (16050028).

18342872 is a wasteful number, since it uses less digits than its factorization.

18342872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292865 (or 2292861 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 18342872 is about 4282.8579243304. The cubic root of 18342872 is about 263.7277189686.

The spelling of 18342872 in words is "eighteen million, three hundred forty-two thousand, eight hundred seventy-two".