22431830 has 8 divisors (see below), whose sum is σ = 40377312. Its totient is φ = 8972728.

The previous prime is 22431821. The next prime is 22431833. The reversal of 22431830 is 3813422.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22431796 and 22431805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121582 + ... + 1121601.

It is an arithmetic number, because the mean of its divisors is an integer number (5047164).

Almost surely, 2^22431830 is an apocalyptic number.

22431830 is a deficient number, since it is larger than the sum of its proper divisors (17945482).

22431830 is a wasteful number, since it uses less digits than its factorization.

22431830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243190.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22431830 is about 4736.2252902496. The cubic root of 22431830 is about 282.0254072308.

The spelling of 22431830 in words is "twenty-two million, four hundred thirty-one thousand, eight hundred thirty".