18206772 has 24 divisors (see below), whose sum is σ = 43285536. Its totient is φ = 5954208.

The previous prime is 18206767. The next prime is 18206789. The reversal of 18206772 is 27760281.

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, 13678 + ... + 14949.

It is an arithmetic number, because the mean of its divisors is an integer number (1803564).

Almost surely, 2^18206772 is an apocalyptic number.

18206772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18206772 is an abundant number, since it is smaller than the sum of its proper divisors (25078764).

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

18206772 is a wasteful number, since it uses less digits than its factorization.

18206772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28687 (or 28685 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 18206772 is about 4266.9394183653. The cubic root of 18206772 is about 263.0738322013.

The spelling of 18206772 in words is "eighteen million, two hundred six thousand, seven hundred seventy-two".