18037995 has 16 divisors (see below), whose sum is σ = 28922400. Its totient is φ = 9599744.

The previous prime is 18037961. The next prime is 18038021. The reversal of 18037995 is 59973081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18037995 - 2⁶ = 18037931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8281 + ... + 10229.

It is an arithmetic number, because the mean of its divisors is an integer number (1807650).

Almost surely, 2^18037995 is an apocalyptic number.

18037995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18037995 is a deficient number, since it is larger than the sum of its proper divisors (10884405).

18037995 is a wasteful number, since it uses less digits than its factorization.

18037995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 18037995 is about 4247.1160803538. The cubic root of 18037995 is about 262.2584081046.

The spelling of 18037995 in words is "eighteen million, thirty-seven thousand, nine hundred ninety-five".