18272952 has 80 divisors (see below), whose sum is σ = 51792840. Its totient is φ = 6018624.

The previous prime is 18272951. The next prime is 18272959. The reversal of 18272952 is 25927281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18272951) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105538 + ... + 105710.

Almost surely, 2^18272952 is an apocalyptic number.

18272952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18272952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25896420).

18272952 is an abundant number, since it is smaller than the sum of its proper divisors (33519888).

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

18272952 is a wasteful number, since it uses less digits than its factorization.

18272952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 341 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 18272952 is about 4274.6873569888. The cubic root of 18272952 is about 263.3921967790.

The spelling of 18272952 in words is "eighteen million, two hundred seventy-two thousand, nine hundred fifty-two".