18037419 has 4 divisors (see below), whose sum is σ = 24049896. Its totient is φ = 12024944.

The previous prime is 18037387. The next prime is 18037423. The reversal of 18037419 is 91473081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18037419 - 2⁵ = 18037387 is a prime.

It is a super-2 number, since 2×18037419² = 650696968363122, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18037419.

It is not an unprimeable number, because it can be changed into a prime (18037469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3006234 + ... + 3006239.

It is an arithmetic number, because the mean of its divisors is an integer number (6012474).

Almost surely, 2^18037419 is an apocalyptic number.

18037419 is a deficient number, since it is larger than the sum of its proper divisors (6012477).

18037419 is an equidigital number, since it uses as much as digits as its factorization.

18037419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012476.

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

The square root of 18037419 is about 4247.0482690923. The cubic root of 18037419 is about 262.2556165443.

The spelling of 18037419 in words is "eighteen million, thirty-seven thousand, four hundred nineteen".