18691934 has 16 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 8686080.

The previous prime is 18691931. The next prime is 18691961. The reversal of 18691934 is 43919681.

It is a junction number, because it is equal to n+sod(n) for n = 18691891 and 18691900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18691931) 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, 2627 + ... + 6654.

It is an arithmetic number, because the mean of its divisors is an integer number (1879605).

Almost surely, 2^18691934 is an apocalyptic number.

18691934 is a deficient number, since it is larger than the sum of its proper divisors (11381746).

18691934 is a wasteful number, since it uses less digits than its factorization.

18691934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9355.

The product of its digits is 46656, while the sum is 41.

The square root of 18691934 is about 4323.4169357118. The cubic root of 18691934 is about 265.3901172347.

The spelling of 18691934 in words is "eighteen million, six hundred ninety-one thousand, nine hundred thirty-four".