18045961 has 8 divisors (see below), whose sum is σ = 18874944. Its totient is φ = 17220720.

The previous prime is 18045949. The next prime is 18045971. The reversal of 18045961 is 16954081.

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

It is a cyclic number.

It is not a de Polignac number, because 18045961 - 2¹¹ = 18043913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18045971) 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, 14610 + ... + 15796.

It is an arithmetic number, because the mean of its divisors is an integer number (2359368).

Almost surely, 2^18045961 is an apocalyptic number.

It is an amenable number.

18045961 is a deficient number, since it is larger than the sum of its proper divisors (828983).

18045961 is a wasteful number, since it uses less digits than its factorization.

18045961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18045961 is about 4248.0537896783. The cubic root of 18045961 is about 262.2970089028.

The spelling of 18045961 in words is "eighteen million, forty-five thousand, nine hundred sixty-one".