18800423 has 4 divisors (see below), whose sum is σ = 19200480. Its totient is φ = 18400368.

The previous prime is 18800393. The next prime is 18800437. The reversal of 18800423 is 32400881.

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 18800423 - 2²⁴ = 2023207 is a prime.

It is a Duffinian number.

18800423 is a modest number, since divided by 423 gives 188 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 18800392 and 18800401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800473) 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, 199958 + ... + 200051.

It is an arithmetic number, because the mean of its divisors is an integer number (4800120).

Almost surely, 2^18800423 is an apocalyptic number.

18800423 is a deficient number, since it is larger than the sum of its proper divisors (400057).

18800423 is an equidigital number, since it uses as much as digits as its factorization.

18800423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400056.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 18800423 is about 4335.9454562990. The cubic root of 18800423 is about 265.9025732863.

It can be divided in two parts, 18800 and 423, that multiplied together give a square (7952400 = 2820²).

The spelling of 18800423 in words is "eighteen million, eight hundred thousand, four hundred twenty-three".