18229137 has 4 divisors (see below), whose sum is σ = 24305520. Its totient is φ = 12152756.

The previous prime is 18229129. The next prime is 18229157. The reversal of 18229137 is 73192281.

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 18229137 - 2³ = 18229129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18229098 and 18229107.

It is not an unprimeable number, because it can be changed into a prime (18229157) 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 3 ways as a sum of consecutive naturals, for example, 3038187 + ... + 3038192.

It is an arithmetic number, because the mean of its divisors is an integer number (6076380).

Almost surely, 2^18229137 is an apocalyptic number.

It is an amenable number.

18229137 is a deficient number, since it is larger than the sum of its proper divisors (6076383).

18229137 is an equidigital number, since it uses as much as digits as its factorization.

18229137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6076382.

The product of its digits is 6048, while the sum is 33.

The square root of 18229137 is about 4269.5593449442. The cubic root of 18229137 is about 263.1815071325.

The spelling of 18229137 in words is "eighteen million, two hundred twenty-nine thousand, one hundred thirty-seven".