18109245 has 32 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 7525440.

The previous prime is 18109237. The next prime is 18109271. The reversal of 18109245 is 54290181.

It is a happy number.

It is not a de Polignac number, because 18109245 - 2³ = 18109237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6685 + ... + 8994.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^18109245 is an apocalyptic number.

18109245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18109245 is a deficient number, since it is larger than the sum of its proper divisors (18017475).

18109245 is a wasteful number, since it uses less digits than its factorization.

18109245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15705.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18109245 is about 4255.4958582990. The cubic root of 18109245 is about 262.6032609617.

The spelling of 18109245 in words is "eighteen million, one hundred nine thousand, two hundred forty-five".