18473772 has 24 divisors (see below), whose sum is σ = 43244992. Its totient is φ = 6138000.

The previous prime is 18473753. The next prime is 18473779. The reversal of 18473772 is 27737481.

It is a self number, because there is not a number n which added to its sum of digits gives 18473772.

It is not an unprimeable number, because it can be changed into a prime (18473779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647 + ... + 6297.

Almost surely, 2^18473772 is an apocalyptic number.

18473772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18473772 is an abundant number, since it is smaller than the sum of its proper divisors (24771220).

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

18473772 is a wasteful number, since it uses less digits than its factorization.

18473772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989 (or 4987 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 18473772 is about 4298.1126090413. The cubic root of 18473772 is about 264.3535781200.

The spelling of 18473772 in words is "eighteen million, four hundred seventy-three thousand, seven hundred seventy-two".