18137029 has 4 divisors (see below), whose sum is σ = 18216460. Its totient is φ = 18057600.

The previous prime is 18137017. The next prime is 18137033. The reversal of 18137029 is 92073181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92073181 = 683 ⋅134807.

It can be written as a sum of positive squares in 2 ways, for example, as 16240900 + 1896129 = 4030^2 + 1377^2 .

It is a cyclic number.

It is not a de Polignac number, because 18137029 - 2⁷ = 18136901 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 (18137089) 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, 39372 + ... + 39829.

It is an arithmetic number, because the mean of its divisors is an integer number (4554115).

Almost surely, 2^18137029 is an apocalyptic number.

It is an amenable number.

18137029 is a deficient number, since it is larger than the sum of its proper divisors (79431).

18137029 is an equidigital number, since it uses as much as digits as its factorization.

18137029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79430.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18137029 is about 4258.7590915665. The cubic root of 18137029 is about 262.7374914944.

The spelling of 18137029 in words is "eighteen million, one hundred thirty-seven thousand, twenty-nine".