21050550315 has 12 divisors (see below), whose sum is σ = 36487620624. Its totient is φ = 11226960144.

The previous prime is 21050550263. The next prime is 21050550331. The reversal of 21050550315 is 51305505012.

21050550315 is a `hidden beast` number, since 2 + 105 + 0 + 550 + 3 + 1 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21050550315 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 233894959 + ... + 233895048.

It is an arithmetic number, because the mean of its divisors is an integer number (3040635052).

Almost surely, 2^21050550315 is an apocalyptic number.

21050550315 is a deficient number, since it is larger than the sum of its proper divisors (15437070309).

21050550315 is a wasteful number, since it uses less digits than its factorization.

21050550315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467790018 (or 467790015 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 21050550315 in words is "twenty-one billion, fifty million, five hundred fifty thousand, three hundred fifteen".