18480661 has 8 divisors (see below), whose sum is σ = 19557504. Its totient is φ = 17426640.

The previous prime is 18480647. The next prime is 18480691. The reversal of 18480661 is 16608481.

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

It is not a de Polignac number, because 18480661 - 2¹³ = 18472469 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 (18480611) 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, 4026 + ... + 7291.

It is an arithmetic number, because the mean of its divisors is an integer number (2444688).

Almost surely, 2^18480661 is an apocalyptic number.

It is an amenable number.

18480661 is a deficient number, since it is larger than the sum of its proper divisors (1076843).

18480661 is a wasteful number, since it uses less digits than its factorization.

18480661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18480661 is about 4298.9139326114. The cubic root of 18480661 is about 264.3864338081.

The spelling of 18480661 in words is "eighteen million, four hundred eighty thousand, six hundred sixty-one".