22121523418 has 8 divisors (see below), whose sum is σ = 34624993248. Its totient is φ = 10579859004.

The previous prime is 22121523401. The next prime is 22121523439. The reversal of 22121523418 is 81432512122.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22121523418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240451296 + ... + 240451387.

It is an arithmetic number, because the mean of its divisors is an integer number (4328124156).

Almost surely, 2^22121523418 is an apocalyptic number.

22121523418 is a deficient number, since it is larger than the sum of its proper divisors (12503469830).

22121523418 is a wasteful number, since it uses less digits than its factorization.

22121523418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480902708.

The product of its digits is 7680, while the sum is 31.

The spelling of 22121523418 in words is "twenty-two billion, one hundred twenty-one million, five hundred twenty-three thousand, four hundred eighteen".