18030657 has 8 divisors (see below), whose sum is σ = 24552576. Its totient is φ = 11764592.

The previous prime is 18030641. The next prime is 18030697. The reversal of 18030657 is 75603081.

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

It is a cyclic number.

It is not a de Polignac number, because 18030657 - 2⁴ = 18030641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18030637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63798 + ... + 64079.

It is an arithmetic number, because the mean of its divisors is an integer number (3069072).

Almost surely, 2^18030657 is an apocalyptic number.

It is an amenable number.

18030657 is a deficient number, since it is larger than the sum of its proper divisors (6521919).

18030657 is a wasteful number, since it uses less digits than its factorization.

18030657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127927.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 18030657 is about 4246.2521121573. The cubic root of 18030657 is about 262.2228403448. Note that the first 3 decimals are identical.

The spelling of 18030657 in words is "eighteen million, thirty thousand, six hundred fifty-seven".