18974145 has 16 divisors (see below), whose sum is σ = 30655872. Its totient is φ = 10020480.

The previous prime is 18974129. The next prime is 18974147. The reversal of 18974145 is 54147981.

It is not a de Polignac number, because 18974145 - 2⁴ = 18974129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18974147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4596 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (1915992).

Almost surely, 2^18974145 is an apocalyptic number.

18974145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18974145 is a deficient number, since it is larger than the sum of its proper divisors (11681727).

18974145 is a wasteful number, since it uses less digits than its factorization.

18974145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12392.

The product of its digits is 40320, while the sum is 39.

The square root of 18974145 is about 4355.9321620062. The cubic root of 18974145 is about 266.7190721658.

The spelling of 18974145 in words is "eighteen million, nine hundred seventy-four thousand, one hundred forty-five".