21247168334 has 8 divisors (see below), whose sum is σ = 36423717168. Its totient is φ = 9105929280.

The previous prime is 21247168309. The next prime is 21247168343. The reversal of 21247168334 is 43386174212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21247168291 and 21247168300.

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 3 ways as a sum of consecutive naturals, for example, 758827427 + ... + 758827454.

It is an arithmetic number, because the mean of its divisors is an integer number (4552964646).

Almost surely, 2^21247168334 is an apocalyptic number.

21247168334 is a deficient number, since it is larger than the sum of its proper divisors (15176548834).

21247168334 is a wasteful number, since it uses less digits than its factorization.

21247168334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517654890.

The product of its digits is 193536, while the sum is 41.

The spelling of 21247168334 in words is "twenty-one billion, two hundred forty-seven million, one hundred sixty-eight thousand, three hundred thirty-four".