21122342474 has 16 divisors (see below), whose sum is σ = 32362357248. Its totient is φ = 10334955792.

The previous prime is 21122342459. The next prime is 21122342533. The reversal of 21122342474 is 47424322112.

It is a self number, because there is not a number n which added to its sum of digits gives 21122342474.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903359 + ... + 926445.

It is an arithmetic number, because the mean of its divisors is an integer number (2022647328).

Almost surely, 2^21122342474 is an apocalyptic number.

21122342474 is a deficient number, since it is larger than the sum of its proper divisors (11240014774).

21122342474 is a wasteful number, since it uses less digits than its factorization.

21122342474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32869.

The product of its digits is 21504, while the sum is 32.

Adding to 21122342474 its reverse (47424322112), we get a palindrome (68546664586).

The spelling of 21122342474 in words is "twenty-one billion, one hundred twenty-two million, three hundred forty-two thousand, four hundred seventy-four".