18368745 has 16 divisors (see below), whose sum is σ = 30404160. Its totient is φ = 9458624.

The previous prime is 18368741. The next prime is 18368759. The reversal of 18368745 is 54786381.

It is a cyclic number.

It is not a de Polignac number, because 18368745 - 2² = 18368741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18368697 and 18368706.

It is not an unprimeable number, because it can be changed into a prime (18368741) 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, 20679 + ... + 21548.

It is an arithmetic number, because the mean of its divisors is an integer number (1900260).

Almost surely, 2^18368745 is an apocalyptic number.

18368745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18368745 is a deficient number, since it is larger than the sum of its proper divisors (12035415).

18368745 is a wasteful number, since it uses less digits than its factorization.

18368745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42264.

The product of its digits is 161280, while the sum is 42.

The square root of 18368745 is about 4285.8773897535. The cubic root of 18368745 is about 263.8516585129.

The spelling of 18368745 in words is "eighteen million, three hundred sixty-eight thousand, seven hundred forty-five".