21050734315 has 64 divisors (see below), whose sum is σ = 29211840000. Its totient is φ = 14433721344.

The previous prime is 21050734303. The next prime is 21050734343. The reversal of 21050734315 is 51343705012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21050734315 - 2²¹ = 21048637163 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14042436 + ... + 14043934.

It is an arithmetic number, because the mean of its divisors is an integer number (456435000).

Almost surely, 2^21050734315 is an apocalyptic number.

21050734315 is a deficient number, since it is larger than the sum of its proper divisors (8161105685).

21050734315 is a wasteful number, since it uses less digits than its factorization.

21050734315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 21050734315 in words is "twenty-one billion, fifty million, seven hundred thirty-four thousand, three hundred fifteen".