18936734 has 4 divisors (see below), whose sum is σ = 28405104. Its totient is φ = 9468366.

The previous prime is 18936721. The next prime is 18936737. The reversal of 18936734 is 43763981.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18936691 and 18936700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18936737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4734182 + ... + 4734185.

It is an arithmetic number, because the mean of its divisors is an integer number (7101276).

Almost surely, 2^18936734 is an apocalyptic number.

18936734 is a deficient number, since it is larger than the sum of its proper divisors (9468370).

18936734 is an equidigital number, since it uses as much as digits as its factorization.

18936734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468369.

The product of its digits is 108864, while the sum is 41.

The square root of 18936734 is about 4351.6357843919. The cubic root of 18936734 is about 266.5436616731.

The spelling of 18936734 in words is "eighteen million, nine hundred thirty-six thousand, seven hundred thirty-four".