21949563336 has 32 divisors (see below), whose sum is σ = 54965248800. Its totient is φ = 7304342400.

The previous prime is 21949563331. The next prime is 21949563347. The reversal of 21949563336 is 63336594912.

It is not an unprimeable number, because it can be changed into a prime (21949563331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746446 + ... + 775293.

It is an arithmetic number, because the mean of its divisors is an integer number (1717664025).

Almost surely, 2^21949563336 is an apocalyptic number.

It is an amenable number.

21949563336 is an abundant number, since it is smaller than the sum of its proper divisors (33015685464).

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

21949563336 is a wasteful number, since it uses less digits than its factorization.

21949563336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522349 (or 1522345 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 51.

The spelling of 21949563336 in words is "twenty-one billion, nine hundred forty-nine million, five hundred sixty-three thousand, three hundred thirty-six".