18548720 has 20 divisors (see below), whose sum is σ = 43125960. Its totient is φ = 7419456.

The previous prime is 18548713. The next prime is 18548723. The reversal of 18548720 is 2784581.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18548723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115850 + ... + 116009.

It is an arithmetic number, because the mean of its divisors is an integer number (2156298).

Almost surely, 2^18548720 is an apocalyptic number.

18548720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18548720 is an abundant number, since it is smaller than the sum of its proper divisors (24577240).

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

18548720 is a wasteful number, since it uses less digits than its factorization.

18548720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231872 (or 231866 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 18548720 is about 4306.8224946009. The cubic root of 18548720 is about 264.7105894685.

The spelling of 18548720 in words is "eighteen million, five hundred forty-eight thousand, seven hundred twenty".