18913474 has 16 divisors (see below), whose sum is σ = 30430080. Its totient is φ = 8789040.

The previous prime is 18913471. The next prime is 18913487. The reversal of 18913474 is 47431981.

It is not an unprimeable number, because it can be changed into a prime (18913471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682 + ... + 6709.

It is an arithmetic number, because the mean of its divisors is an integer number (1901880).

Almost surely, 2^18913474 is an apocalyptic number.

18913474 is a deficient number, since it is larger than the sum of its proper divisors (11516606).

18913474 is a wasteful number, since it uses less digits than its factorization.

18913474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465.

The product of its digits is 24192, while the sum is 37.

The square root of 18913474 is about 4348.9624049881. The cubic root of 18913474 is about 266.4344850553.

The spelling of 18913474 in words is "eighteen million, nine hundred thirteen thousand, four hundred seventy-four".