18416961 has 12 divisors (see below), whose sum is σ = 26647140. Its totient is φ = 12257280.

The previous prime is 18416941. The next prime is 18416969. The reversal of 18416961 is 16961481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 269361 + 18147600 = 519^2 + 4260^2 .

It is not a de Polignac number, because 18416961 - 2⁵ = 18416929 is a prime.

Its product of digits (10368) is a multiple of the sum of its prime factors (3456).

It is not an unprimeable number, because it can be changed into a prime (18416969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5505 + ... + 8193.

It is an arithmetic number, because the mean of its divisors is an integer number (2220595).

Almost surely, 2^18416961 is an apocalyptic number.

It is an amenable number.

18416961 is a deficient number, since it is larger than the sum of its proper divisors (8230179).

18416961 is a wasteful number, since it uses less digits than its factorization.

18416961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456 (or 3453 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18416961 is about 4291.4986892693. The cubic root of 18416961 is about 264.0823176495.

The spelling of 18416961 in words is "eighteen million, four hundred sixteen thousand, nine hundred sixty-one".