21225574946 has 32 divisors (see below), whose sum is σ = 33653587968. Its totient is φ = 10024474320.

The previous prime is 21225574939. The next prime is 21225574967. The reversal of 21225574946 is 64947552212.

It is a self number, because there is not a number n which added to its sum of digits gives 21225574946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7162061 + ... + 7165023.

It is an arithmetic number, because the mean of its divisors is an integer number (1051674624).

Almost surely, 2^21225574946 is an apocalyptic number.

21225574946 is a deficient number, since it is larger than the sum of its proper divisors (12428013022).

21225574946 is a wasteful number, since it uses less digits than its factorization.

21225574946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726.

The product of its digits is 1209600, while the sum is 47.

The spelling of 21225574946 in words is "twenty-one billion, two hundred twenty-five million, five hundred seventy-four thousand, nine hundred forty-six".