18660898 has 8 divisors (see below), whose sum is σ = 28017360. Its totient is φ = 9321780.

The previous prime is 18660893. The next prime is 18660899. The reversal of 18660898 is 89806681.

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

It is a super-2 number, since 2×18660898² = 696458228332808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18660893) 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, 1188 + ... + 6223.

It is an arithmetic number, because the mean of its divisors is an integer number (3502170).

Almost surely, 2^18660898 is an apocalyptic number.

18660898 is a deficient number, since it is larger than the sum of its proper divisors (9356462).

18660898 is a wasteful number, since it uses less digits than its factorization.

18660898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672.

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 18660898 is about 4319.8261539094. The cubic root of 18660898 is about 265.2431516936.

The spelling of 18660898 in words is "eighteen million, six hundred sixty thousand, eight hundred ninety-eight".