18422785 has 8 divisors (see below), whose sum is σ = 22165416. Its totient is φ = 14699520.

The previous prime is 18422777. The next prime is 18422797. The reversal of 18422785 is 58722481.

It can be written as a sum of positive squares in 4 ways, for example, as 6471936 + 11950849 = 2544^2 + 3457^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18422785 - 2³ = 18422777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2656 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (2770677).

Almost surely, 2^18422785 is an apocalyptic number.

It is an amenable number.

18422785 is a deficient number, since it is larger than the sum of its proper divisors (3742631).

18422785 is an equidigital number, since it uses as much as digits as its factorization.

18422785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9683.

The product of its digits is 35840, while the sum is 37.

The square root of 18422785 is about 4292.1771864638. The cubic root of 18422785 is about 264.1101516539.

The spelling of 18422785 in words is "eighteen million, four hundred twenty-two thousand, seven hundred eighty-five".