18800745 has 16 divisors (see below), whose sum is σ = 30445632. Its totient is φ = 9905600.

The previous prime is 18800741. The next prime is 18800753. The reversal of 18800745 is 54700881.

It is a happy number.

It is not a de Polignac number, because 18800745 - 2² = 18800741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18800741) 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, 6306 + ... + 8795.

It is an arithmetic number, because the mean of its divisors is an integer number (1902852).

Almost surely, 2^18800745 is an apocalyptic number.

18800745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18800745 is a deficient number, since it is larger than the sum of its proper divisors (11644887).

18800745 is a wasteful number, since it uses less digits than its factorization.

18800745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15192.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 18800745 is about 4335.9825876034. The cubic root of 18800745 is about 265.9040913397.

The spelling of 18800745 in words is "eighteen million, eight hundred thousand, seven hundred forty-five".