18148157 has 4 divisors (see below), whose sum is σ = 18534336. Its totient is φ = 17761980.

The previous prime is 18148153. The next prime is 18148159. The reversal of 18148157 is 75184181.

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.

It is a cyclic number.

It is not a de Polignac number, because 18148157 - 2² = 18148153 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 (18148153) 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, 193019 + ... + 193112.

It is an arithmetic number, because the mean of its divisors is an integer number (4633584).

Almost surely, 2^18148157 is an apocalyptic number.

It is an amenable number.

18148157 is a deficient number, since it is larger than the sum of its proper divisors (386179).

18148157 is an equidigital number, since it uses as much as digits as its factorization.

18148157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386178.

The product of its digits is 8960, while the sum is 35.

The square root of 18148157 is about 4260.0653750852. The cubic root of 18148157 is about 262.7912148294.

The spelling of 18148157 in words is "eighteen million, one hundred forty-eight thousand, one hundred fifty-seven".