21151996306 has 24 divisors (see below), whose sum is σ = 37273519116. Its totient is φ = 8975383200.

The previous prime is 21151996301. The next prime is 21151996321. The reversal of 21151996306 is 60369915112.

21151996306 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15990867025 + 5161129281 = 126455^2 + 71841^2 .

It is not an unprimeable number, because it can be changed into a prime (21151996301) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1058601 + ... + 1078396.

Almost surely, 2^21151996306 is an apocalyptic number.

21151996306 is a deficient number, since it is larger than the sum of its proper divisors (16121522810).

21151996306 is a wasteful number, since it uses less digits than its factorization.

21151996306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137114 (or 2137107 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The spelling of 21151996306 in words is "twenty-one billion, one hundred fifty-one million, nine hundred ninety-six thousand, three hundred six".