21986999082 has 24 divisors (see below), whose sum is σ = 50145788160. Its totient is φ = 6943262760.

The previous prime is 21986999039. The next prime is 21986999087. The reversal of 21986999082 is 28099968912.

It is not an unprimeable number, because it can be changed into a prime (21986999087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32144394 + ... + 32145077.

It is an arithmetic number, because the mean of its divisors is an integer number (2089407840).

Almost surely, 2^21986999082 is an apocalyptic number.

21986999082 is an abundant number, since it is smaller than the sum of its proper divisors (28158789078).

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

21986999082 is a wasteful number, since it uses less digits than its factorization.

21986999082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64289498 (or 64289495 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The spelling of 21986999082 in words is "twenty-one billion, nine hundred eighty-six million, nine hundred ninety-nine thousand, eighty-two".