18945995 has 16 divisors (see below), whose sum is σ = 23369472. Its totient is φ = 14740320.

The previous prime is 18945967. The next prime is 18946003. The reversal of 18945995 is 59954981.

It is not a de Polignac number, because 18945995 - 2⁶ = 18945931 is a prime.

It is a Duffinian number.

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, 29144 + ... + 29786.

It is an arithmetic number, because the mean of its divisors is an integer number (1460592).

Almost surely, 2^18945995 is an apocalyptic number.

18945995 is a deficient number, since it is larger than the sum of its proper divisors (4423477).

18945995 is an equidigital number, since it uses as much as digits as its factorization.

18945995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its digits is 583200, while the sum is 50.

The square root of 18945995 is about 4352.6997369449. The cubic root of 18945995 is about 266.5871056053.

The spelling of 18945995 in words is "eighteen million, nine hundred forty-five thousand, nine hundred ninety-five".