1820363423 has 4 divisors (see below), whose sum is σ = 1822323840. Its totient is φ = 1818403008.

The previous prime is 1820363399. The next prime is 1820363459. The reversal of 1820363423 is 3243630281.

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 1820363423 - 2¹⁰ = 1820362399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1820363423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820363473) 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, 978815 + ... + 980672.

It is an arithmetic number, because the mean of its divisors is an integer number (455580960).

Almost surely, 2^1820363423 is an apocalyptic number.

1820363423 is a deficient number, since it is larger than the sum of its proper divisors (1960417).

1820363423 is an equidigital number, since it uses as much as digits as its factorization.

1820363423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960416.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1820363423 is about 42665.7171860500. The cubic root of 1820363423 is about 1221.0104105900.

The spelling of 1820363423 in words is "one billion, eight hundred twenty million, three hundred sixty-three thousand, four hundred twenty-three".