18912475 has 24 divisors (see below), whose sum is σ = 24426512. Its totient is φ = 14515200.

The previous prime is 18912473. The next prime is 18912497. The reversal of 18912475 is 57421981.

It is not a de Polignac number, because 18912475 - 2¹ = 18912473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18912473) 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 23 ways as a sum of consecutive naturals, for example, 78355 + ... + 78595.

Almost surely, 2^18912475 is an apocalyptic number.

18912475 is a deficient number, since it is larger than the sum of its proper divisors (5514037).

18912475 is a wasteful number, since it uses less digits than its factorization.

18912475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 362 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 18912475 is about 4348.8475484891. The cubic root of 18912475 is about 266.4297939951.

The spelling of 18912475 in words is "eighteen million, nine hundred twelve thousand, four hundred seventy-five".