18422402 has 16 divisors (see below), whose sum is σ = 29452032. Its totient is φ = 8622240.

The previous prime is 18422389. The next prime is 18422479. The reversal of 18422402 is 20422481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 2099 + ... + 6422.

It is an arithmetic number, because the mean of its divisors is an integer number (1840752).

Almost surely, 2^18422402 is an apocalyptic number.

18422402 is a deficient number, since it is larger than the sum of its proper divisors (11029630).

18422402 is a wasteful number, since it uses less digits than its factorization.

18422402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 18422402 is about 4292.1325701800. The cubic root of 18422402 is about 264.1083214043.

Adding to 18422402 its reverse (20422481), we get a palindrome (38844883).

The spelling of 18422402 in words is "eighteen million, four hundred twenty-two thousand, four hundred two".