18930775 has 12 divisors (see below), whose sum is σ = 24855552. Its totient is φ = 14253440.

The previous prime is 18930773. The next prime is 18930781. The reversal of 18930775 is 57703981.

It is not a de Polignac number, because 18930775 - 2¹ = 18930773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21847 + ... + 22696.

It is an arithmetic number, because the mean of its divisors is an integer number (2071296).

Almost surely, 2^18930775 is an apocalyptic number.

18930775 is a deficient number, since it is larger than the sum of its proper divisors (5924777).

18930775 is a wasteful number, since it uses less digits than its factorization.

18930775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44570 (or 44565 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 18930775 is about 4350.9510454612. The cubic root of 18930775 is about 266.5157001406.

The spelling of 18930775 in words is "eighteen million, nine hundred thirty thousand, seven hundred seventy-five".