18463720 has 64 divisors (see below), whose sum is σ = 46915200. Its totient is φ = 6478080.

The previous prime is 18463699. The next prime is 18463721. The reversal of 18463720 is 2736481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18463721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12037 + ... + 13483.

It is an arithmetic number, because the mean of its divisors is an integer number (733050).

Almost surely, 2^18463720 is an apocalyptic number.

18463720 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 18463720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23457600).

18463720 is an abundant number, since it is smaller than the sum of its proper divisors (28451480).

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

18463720 is a wasteful number, since it uses less digits than its factorization.

18463720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 18463720 is about 4296.9430994604. The cubic root of 18463720 is about 264.3056224872.

The spelling of 18463720 in words is "eighteen million, four hundred sixty-three thousand, seven hundred twenty".