18940875 has 32 divisors (see below), whose sum is σ = 32145984. Its totient is φ = 9900800.

The previous prime is 18940871. The next prime is 18940877. The reversal of 18940875 is 57804981.

It is not a de Polignac number, because 18940875 - 2² = 18940871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940871) 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, 19399 + ... + 20351.

It is an arithmetic number, because the mean of its divisors is an integer number (1004562).

Almost surely, 2^18940875 is an apocalyptic number.

18940875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18940875 is a deficient number, since it is larger than the sum of its proper divisors (13205109).

18940875 is an equidigital number, since it uses as much as digits as its factorization.

18940875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18940875 is about 4352.1115564746. Note that the first 3 decimals coincide. The cubic root of 18940875 is about 266.5630891143.

The spelling of 18940875 in words is "eighteen million, nine hundred forty thousand, eight hundred seventy-five".