18450072 has 64 divisors (see below), whose sum is σ = 51612000. Its totient is φ = 6106752.

The previous prime is 18450059. The next prime is 18450101. The reversal of 18450072 is 27005481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49278 + ... + 49650.

Almost surely, 2^18450072 is an apocalyptic number.

18450072 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 18450072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25806000).

18450072 is an abundant number, since it is smaller than the sum of its proper divisors (33161928).

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

18450072 is a wasteful number, since it uses less digits than its factorization.

18450072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18450072 is about 4295.3547001383. The cubic root of 18450072 is about 264.2404833513.

The spelling of 18450072 in words is "eighteen million, four hundred fifty thousand, seventy-two".