18253157 has 8 divisors (see below), whose sum is σ = 19699680. Its totient is φ = 16812720.

The previous prime is 18253153. The next prime is 18253171. The reversal of 18253157 is 75135281.

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 18253157 - 2² = 18253153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18253153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6194 + ... + 8652.

It is an arithmetic number, because the mean of its divisors is an integer number (2462460).

Almost surely, 2^18253157 is an apocalyptic number.

It is an amenable number.

18253157 is a deficient number, since it is larger than the sum of its proper divisors (1446523).

18253157 is a wasteful number, since it uses less digits than its factorization.

18253157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043.

The product of its digits is 8400, while the sum is 32.

The square root of 18253157 is about 4272.3713555823. The cubic root of 18253157 is about 263.2970519190.

The spelling of 18253157 in words is "eighteen million, two hundred fifty-three thousand, one hundred fifty-seven".