18473961 has 32 divisors (see below), whose sum is σ = 28182528. Its totient is φ = 10664640.

The previous prime is 18473887. The next prime is 18473963. The reversal of 18473961 is 16937481.

It is not a de Polignac number, because 18473961 - 2⁹ = 18473449 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18473963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66555 + ... + 66831.

It is an arithmetic number, because the mean of its divisors is an integer number (880704).

Almost surely, 2^18473961 is an apocalyptic number.

18473961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18473961 is a deficient number, since it is larger than the sum of its proper divisors (9708567).

18473961 is a wasteful number, since it uses less digits than its factorization.

18473961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 36288, while the sum is 39.

The square root of 18473961 is about 4298.1345953797. The cubic root of 18473961 is about 264.3544796261.

The spelling of 18473961 in words is "eighteen million, four hundred seventy-three thousand, nine hundred sixty-one".