18202422 has 48 divisors (see below), whose sum is σ = 42837552. Its totient is φ = 5140800.

The previous prime is 18202403. The next prime is 18202433. The reversal of 18202422 is 22420281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29388 + ... + 30000.

It is an arithmetic number, because the mean of its divisors is an integer number (892449).

Almost surely, 2^18202422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18202422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21418776).

18202422 is an abundant number, since it is smaller than the sum of its proper divisors (24635130).

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

18202422 is a wasteful number, since it uses less digits than its factorization.

18202422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 18202422 is about 4266.4296548754. The cubic root of 18202422 is about 263.0528791494.

The spelling of 18202422 in words is "eighteen million, two hundred two thousand, four hundred twenty-two".