18090422 has 32 divisors (see below), whose sum is σ = 32507904. Its totient is φ = 7387200.

The previous prime is 18090409. The next prime is 18090427. The reversal of 18090422 is 22409081.

It is a junction number, because it is equal to n+sod(n) for n = 18090391 and 18090400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31397 + ... + 31967.

It is an arithmetic number, because the mean of its divisors is an integer number (1015872).

Almost surely, 2^18090422 is an apocalyptic number.

18090422 is a deficient number, since it is larger than the sum of its proper divisors (14417482).

18090422 is a wasteful number, since it uses less digits than its factorization.

18090422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18090422 is about 4253.2836726463. The cubic root of 18090422 is about 262.5122449314.

The spelling of 18090422 in words is "eighteen million, ninety thousand, four hundred twenty-two".