18748473 has 32 divisors (see below), whose sum is σ = 27371520. Its totient is φ = 11383680.

The previous prime is 18748453. The next prime is 18748487. The reversal of 18748473 is 37484781.

It is not a de Polignac number, because 18748473 - 2⁹ = 18747961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18748403) 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 31 ways as a sum of consecutive naturals, for example, 210613 + ... + 210701.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^18748473 is an apocalyptic number.

It is an amenable number.

18748473 is a deficient number, since it is larger than the sum of its proper divisors (8623047).

18748473 is a wasteful number, since it uses less digits than its factorization.

18748473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229.

The product of its digits is 150528, while the sum is 42.

The square root of 18748473 is about 4329.9506925599. The cubic root of 18748473 is about 265.6574301904.

The spelling of 18748473 in words is "eighteen million, seven hundred forty-eight thousand, four hundred seventy-three".