18145964 has 6 divisors (see below), whose sum is σ = 31755444. Its totient is φ = 9072980.

The previous prime is 18145951. The next prime is 18145973. The reversal of 18145964 is 46954181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2268242 + ... + 2268249.

It is an arithmetic number, because the mean of its divisors is an integer number (5292574).

Almost surely, 2^18145964 is an apocalyptic number.

It is an amenable number.

18145964 is a deficient number, since it is larger than the sum of its proper divisors (13609480).

18145964 is a wasteful number, since it uses less digits than its factorization.

18145964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536495 (or 4536493 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 18145964 is about 4259.8079768929. The cubic root of 18145964 is about 262.7806292853.

The spelling of 18145964 in words is "eighteen million, one hundred forty-five thousand, nine hundred sixty-four".