22071830 has 32 divisors (see below), whose sum is σ = 43642368. Its totient is φ = 7970400.

The previous prime is 22071809. The next prime is 22071839. The reversal of 22071830 is 3817022.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22071796 and 22071805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22071839) 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, 17315 + ... + 18545.

It is an arithmetic number, because the mean of its divisors is an integer number (1363824).

Almost surely, 2^22071830 is an apocalyptic number.

22071830 is a deficient number, since it is larger than the sum of its proper divisors (21570538).

22071830 is a wasteful number, since it uses less digits than its factorization.

22071830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 22071830 is about 4698.0666236230. The cubic root of 22071830 is about 280.5085570537.

Adding to 22071830 its reverse (3817022), we get a palindrome (25888852).

The spelling of 22071830 in words is "twenty-two million, seventy-one thousand, eight hundred thirty".