18076720 has 80 divisors (see below), whose sum is σ = 44782848. Its totient is φ = 6773760.

The previous prime is 18076711. The next prime is 18076741. The reversal of 18076720 is 2767081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 91662 + ... + 91858.

Almost surely, 2^18076720 is an apocalyptic number.

18076720 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 18076720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22391424).

18076720 is an abundant number, since it is smaller than the sum of its proper divisors (26706128).

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

18076720 is a wasteful number, since it uses less digits than its factorization.

18076720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 18076720 is about 4251.6726120434. The cubic root of 18076720 is about 262.4459510792.

The spelling of 18076720 in words is "eighteen million, seventy-six thousand, seven hundred twenty".