21071968334 has 8 divisors (see below), whose sum is σ = 32627563968. Its totient is φ = 10196113680.

The previous prime is 21071968301. The next prime is 21071968343. The reversal of 21071968334 is 43386917012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169935167 + ... + 169935290.

It is an arithmetic number, because the mean of its divisors is an integer number (4078445496).

Almost surely, 2^21071968334 is an apocalyptic number.

21071968334 is a deficient number, since it is larger than the sum of its proper divisors (11555595634).

21071968334 is a wasteful number, since it uses less digits than its factorization.

21071968334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339870490.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 21071968334 in words is "twenty-one billion, seventy-one million, nine hundred sixty-eight thousand, three hundred thirty-four".