21952284976 has 40 divisors (see below), whose sum is σ = 44015598000. Its totient is φ = 10593703680.

The previous prime is 21952284967. The next prime is 21952285001. The reversal of 21952284976 is 67948225912.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 1523566 + ... + 1537906.

It is an arithmetic number, because the mean of its divisors is an integer number (1100389950).

Almost surely, 2^21952284976 is an apocalyptic number.

It is an amenable number.

21952284976 is an abundant number, since it is smaller than the sum of its proper divisors (22063313024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21952284976 is a wasteful number, since it uses less digits than its factorization.

21952284976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17677 (or 17671 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The spelling of 21952284976 in words is "twenty-one billion, nine hundred fifty-two million, two hundred eighty-four thousand, nine hundred seventy-six".