18150720 has 224 divisors, whose sum is σ = 68567808. Its totient is φ = 3981312.

The previous prime is 18150709. The next prime is 18150721. The reversal of 18150720 is 2705181.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18150721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248604 + ... + 248676.

Almost surely, 2^18150720 is an apocalyptic number.

18150720 is a gapful number since it is divisible by the number (10) 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 18150720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34283904).

18150720 is an abundant number, since it is smaller than the sum of its proper divisors (50417088).

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

18150720 is a wasteful number, since it uses less digits than its factorization.

18150720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 18150720 is about 4260.3661814450. The cubic root of 18150720 is about 262.8035852716.

The spelling of 18150720 in words is "eighteen million, one hundred fifty thousand, seven hundred twenty".