21099599582 has 16 divisors (see below), whose sum is σ = 31906593360. Its totient is φ = 10464366528.

The previous prime is 21099599531. The next prime is 21099599593. The reversal of 21099599582 is 28599599012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 67898 + ... + 216354.

It is an arithmetic number, because the mean of its divisors is an integer number (1994162085).

Almost surely, 2^21099599582 is an apocalyptic number.

21099599582 is a deficient number, since it is larger than the sum of its proper divisors (10806993778).

21099599582 is a wasteful number, since it uses less digits than its factorization.

21099599582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149035.

The product of its (nonzero) digits is 5248800, while the sum is 59.

The spelling of 21099599582 in words is "twenty-one billion, ninety-nine million, five hundred ninety-nine thousand, five hundred eighty-two".