21190022 has 8 divisors (see below), whose sum is σ = 36325776. Its totient is φ = 9081432.

The previous prime is 21190003. The next prime is 21190051. The reversal of 21190022 is 22009112.

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

It is a congruent number.

It is an unprimeable number.

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, 756773 + ... + 756800.

It is an arithmetic number, because the mean of its divisors is an integer number (4540722).

Almost surely, 2^21190022 is an apocalyptic number.

21190022 is a deficient number, since it is larger than the sum of its proper divisors (15135754).

21190022 is a wasteful number, since it uses less digits than its factorization.

21190022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513582.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 21190022 is about 4603.2621042039. The cubic root of 21190022 is about 276.7220730633.

Adding to 21190022 its reverse (22009112), we get a palindrome (43199134).

The spelling of 21190022 in words is "twenty-one million, one hundred ninety thousand, twenty-two".