21056466303 has 6 divisors (see below), whose sum is σ = 30414895784. Its totient is φ = 14037644196.

The previous prime is 21056466253. The next prime is 21056466317. The reversal of 21056466303 is 30366465012.

21056466303 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 646 + 6 + 3 + 0 + 3 = 666.

It is not a de Polignac number, because 21056466303 - 2¹⁴ = 21056449919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21056466383) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1169803675 + ... + 1169803692.

Almost surely, 2^21056466303 is an apocalyptic number.

21056466303 is a deficient number, since it is larger than the sum of its proper divisors (9358429481).

21056466303 is a wasteful number, since it uses less digits than its factorization.

21056466303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339607373 (or 2339607370 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 21056466303 in words is "twenty-one billion, fifty-six million, four hundred sixty-six thousand, three hundred three".