18342772 has 24 divisors (see below), whose sum is σ = 36852480. Its totient is φ = 7825440.

The previous prime is 18342769. The next prime is 18342803. The reversal of 18342772 is 27724381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5322 + ... + 8062.

It is an arithmetic number, because the mean of its divisors is an integer number (1535520).

Almost surely, 2^18342772 is an apocalyptic number.

It is an amenable number.

18342772 is an abundant number, since it is smaller than the sum of its proper divisors (18509708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18342772 is a wasteful number, since it uses less digits than its factorization.

18342772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991 (or 2989 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 18342772 is about 4282.8462498670. The cubic root of 18342772 is about 263.7272397122.

The spelling of 18342772 in words is "eighteen million, three hundred forty-two thousand, seven hundred seventy-two".