18044961 has 16 divisors (see below), whose sum is σ = 26889408. Its totient is φ = 10668800.

The previous prime is 18044951. The next prime is 18044969. The reversal of 18044961 is 16944081.

It is a cyclic number.

It is not a de Polignac number, because 18044961 - 2⁷ = 18044833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

18044961 is a modest number, since divided by 4961 gives 1804 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18044969) 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, 5316 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (1680588).

Almost surely, 2^18044961 is an apocalyptic number.

18044961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18044961 is a deficient number, since it is larger than the sum of its proper divisors (8844447).

18044961 is a wasteful number, since it uses less digits than its factorization.

18044961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18044961 is about 4247.9360870898. The cubic root of 18044961 is about 262.2921638324.

The spelling of 18044961 in words is "eighteen million, forty-four thousand, nine hundred sixty-one".