18421422 has 24 divisors (see below), whose sum is σ = 37585464. Its totient is φ = 6019104.

The previous prime is 18421411. The next prime is 18421433. The reversal of 18421422 is 22412481.

It is an interprime number because it is at equal distance from previous prime (18421411) and next prime (18421433).

It is a junction number, because it is equal to n+sod(n) for n = 18421392 and 18421401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16308 + ... + 17400.

It is an arithmetic number, because the mean of its divisors is an integer number (1566061).

Almost surely, 2^18421422 is an apocalyptic number.

18421422 is an abundant number, since it is smaller than the sum of its proper divisors (19164042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18421422 is a wasteful number, since it uses less digits than its factorization.

18421422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1151 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 18421422 is about 4292.0184062979. The cubic root of 18421422 is about 264.1036381434.

The spelling of 18421422 in words is "eighteen million, four hundred twenty-one thousand, four hundred twenty-two".