18813475 has 12 divisors (see below), whose sum is σ = 24701544. Its totient is φ = 14165120.

The previous prime is 18813469. The next prime is 18813479. The reversal of 18813475 is 57431881.

It is a de Polignac number, because none of the positive numbers 2^k-18813475 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18813479) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 21709 + ... + 22558.

It is an arithmetic number, because the mean of its divisors is an integer number (2058462).

Almost surely, 2^18813475 is an apocalyptic number.

18813475 is a deficient number, since it is larger than the sum of its proper divisors (5888069).

18813475 is a wasteful number, since it uses less digits than its factorization.

18813475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44294 (or 44289 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 18813475 is about 4337.4502878996. The cubic root of 18813475 is about 265.9640924263.

It can be divided in two parts, 1881 and 3475, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 18813475 in words is "eighteen million, eight hundred thirteen thousand, four hundred seventy-five".