18934783 has 4 divisors (see below), whose sum is σ = 21639760. Its totient is φ = 16229808.

The previous prime is 18934781. The next prime is 18934793. The reversal of 18934783 is 38743981.

It is a happy number.

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

It is not a de Polignac number, because 18934783 - 2¹ = 18934781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352478 + ... + 1352491.

It is an arithmetic number, because the mean of its divisors is an integer number (5409940).

Almost surely, 2^18934783 is an apocalyptic number.

18934783 is a deficient number, since it is larger than the sum of its proper divisors (2704977).

18934783 is an equidigital number, since it uses as much as digits as its factorization.

18934783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704976.

The product of its digits is 145152, while the sum is 43.

The square root of 18934783 is about 4351.4116100410. The cubic root of 18934783 is about 266.5345076035.

The spelling of 18934783 in words is "eighteen million, nine hundred thirty-four thousand, seven hundred eighty-three".