18661282 has 8 divisors (see below), whose sum is σ = 28375596. Its totient is φ = 9202752.

The previous prime is 18661277. The next prime is 18661289. The reversal of 18661282 is 28216681.

It can be written as a sum of positive squares in 2 ways, for example, as 18224361 + 436921 = 4269^2 + 661^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18661289) 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, 63763 + ... + 64054.

Almost surely, 2^18661282 is an apocalyptic number.

18661282 is a deficient number, since it is larger than the sum of its proper divisors (9714314).

18661282 is a wasteful number, since it uses less digits than its factorization.

18661282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127892.

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

The square root of 18661282 is about 4319.8705999138. The cubic root of 18661282 is about 265.2449710535.

The spelling of 18661282 in words is "eighteen million, six hundred sixty-one thousand, two hundred eighty-two".