18261422 has 8 divisors (see below), whose sum is σ = 27410376. Its totient is φ = 9124632.

The previous prime is 18261409. The next prime is 18261431. The reversal of 18261422 is 22416281.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18261391 and 18261400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3728 + ... + 7100.

It is an arithmetic number, because the mean of its divisors is an integer number (3426297).

Almost surely, 2^18261422 is an apocalyptic number.

18261422 is a deficient number, since it is larger than the sum of its proper divisors (9148954).

18261422 is a wasteful number, since it uses less digits than its factorization.

18261422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082.

The product of its digits is 1536, while the sum is 26.

The square root of 18261422 is about 4273.3385075372. The cubic root of 18261422 is about 263.3367860823.

The spelling of 18261422 in words is "eighteen million, two hundred sixty-one thousand, four hundred twenty-two".