18240965 has 8 divisors (see below), whose sum is σ = 22197888. Its totient is φ = 14386960.

The previous prime is 18240961. The next prime is 18240967. The reversal of 18240965 is 56904281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18240965 - 2² = 18240961 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18240961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25337 + ... + 26046.

It is an arithmetic number, because the mean of its divisors is an integer number (2774736).

Almost surely, 2^18240965 is an apocalyptic number.

It is an amenable number.

18240965 is a deficient number, since it is larger than the sum of its proper divisors (3956923).

18240965 is an equidigital number, since it uses as much as digits as its factorization.

18240965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51459.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 18240965 is about 4270.9442749818. The cubic root of 18240965 is about 263.2384167170.

The spelling of 18240965 in words is "eighteen million, two hundred forty thousand, nine hundred sixty-five".