18920063 has 4 divisors (see below), whose sum is σ = 19202520. Its totient is φ = 18637608.

The previous prime is 18920051. The next prime is 18920071. The reversal of 18920063 is 36002981.

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

It is a cyclic number.

It is not a de Polignac number, because 18920063 - 2⁴ = 18920047 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 (18920003) 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 in 3 ways as a sum of consecutive naturals, for example, 141128 + ... + 141261.

It is an arithmetic number, because the mean of its divisors is an integer number (4800630).

Almost surely, 2^18920063 is an apocalyptic number.

18920063 is a deficient number, since it is larger than the sum of its proper divisors (282457).

18920063 is an equidigital number, since it uses as much as digits as its factorization.

18920063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282456.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18920063 is about 4349.7198760380. The cubic root of 18920063 is about 266.4654212545.

The spelling of 18920063 in words is "eighteen million, nine hundred twenty thousand, sixty-three".