18422019 has 32 divisors (see below), whose sum is σ = 34030080. Its totient is φ = 9568800.

The previous prime is 18422009. The next prime is 18422071. The reversal of 18422019 is 91022481.

It is not a de Polignac number, because 18422019 - 2⁴ = 18422003 is a prime.

It is a super-2 number, since 2×18422019² = 678741568072722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18421983 and 18422001.

It is not an unprimeable number, because it can be changed into a prime (18422009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2352 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (1063440).

Almost surely, 2^18422019 is an apocalyptic number.

18422019 is a deficient number, since it is larger than the sum of its proper divisors (15608061).

18422019 is a wasteful number, since it uses less digits than its factorization.

18422019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8888 (or 8882 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18422019 is about 4292.0879534325. The cubic root of 18422019 is about 264.1064911292.

The spelling of 18422019 in words is "eighteen million, four hundred twenty-two thousand, nineteen".