18137541 has 4 divisors (see below), whose sum is σ = 24183392. Its totient is φ = 12091692.

The previous prime is 18137513. The next prime is 18137543. The reversal of 18137541 is 14573181.

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 not a de Polignac number, because 18137541 - 2¹⁵ = 18104773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18137499 and 18137508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18137543) 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, 3022921 + ... + 3022926.

It is an arithmetic number, because the mean of its divisors is an integer number (6045848).

Almost surely, 2^18137541 is an apocalyptic number.

It is an amenable number.

18137541 is a deficient number, since it is larger than the sum of its proper divisors (6045851).

18137541 is an equidigital number, since it uses as much as digits as its factorization.

18137541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6045850.

The product of its digits is 3360, while the sum is 30.

The square root of 18137541 is about 4258.8192025490. The cubic root of 18137541 is about 262.7399637907.

The spelling of 18137541 in words is "eighteen million, one hundred thirty-seven thousand, five hundred forty-one".