18401422 has 8 divisors (see below), whose sum is σ = 29725416. Its totient is φ = 8492952.

The previous prime is 18401419. The next prime is 18401423. The reversal of 18401422 is 22410481.

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

It is a super-2 number, since 2×18401422² = 677224663244168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18401393 and 18401402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353848 + ... + 353899.

It is an arithmetic number, because the mean of its divisors is an integer number (3715677).

Almost surely, 2^18401422 is an apocalyptic number.

18401422 is a deficient number, since it is larger than the sum of its proper divisors (11323994).

18401422 is a wasteful number, since it uses less digits than its factorization.

18401422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707762.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 18401422 is about 4289.6878674328. The cubic root of 18401422 is about 264.0080250851.

The spelling of 18401422 in words is "eighteen million, four hundred one thousand, four hundred twenty-two".