21131330996 has 24 divisors (see below), whose sum is σ = 37275860160. Its totient is φ = 10481208192.

The previous prime is 21131330963. The next prime is 21131331073. The reversal of 21131330996 is 69903313112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 706481 + ... + 735783.

It is an arithmetic number, because the mean of its divisors is an integer number (1553160840).

Almost surely, 2^21131330996 is an apocalyptic number.

It is an amenable number.

21131330996 is a deficient number, since it is larger than the sum of its proper divisors (16144529164).

21131330996 is a wasteful number, since it uses less digits than its factorization.

21131330996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30743 (or 30741 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 21131330996 in words is "twenty-one billion, one hundred thirty-one million, three hundred thirty thousand, nine hundred ninety-six".