18496661 has 4 divisors (see below), whose sum is σ = 18642432. Its totient is φ = 18350892.

The previous prime is 18496649. The next prime is 18496691. The reversal of 18496661 is 16669481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16669481 = 271 ⋅61511.

It is a cyclic number.

It is not a de Polignac number, because 18496661 - 2¹⁴ = 18480277 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 (18496691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72695 + ... + 72948.

It is an arithmetic number, because the mean of its divisors is an integer number (4660608).

Almost surely, 2^18496661 is an apocalyptic number.

It is an amenable number.

18496661 is a deficient number, since it is larger than the sum of its proper divisors (145771).

18496661 is a wasteful number, since it uses less digits than its factorization.

18496661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145770.

The product of its digits is 62208, while the sum is 41.

The square root of 18496661 is about 4300.7744651400. The cubic root of 18496661 is about 264.4627110715.

The spelling of 18496661 in words is "eighteen million, four hundred ninety-six thousand, six hundred sixty-one".