21064046263 has 24 divisors (see below), whose sum is σ = 23635518720. Its totient is φ = 18750644640.

The previous prime is 21064046251. The next prime is 21064046303. The reversal of 21064046263 is 36264046012.

It is a de Polignac number, because none of the positive numbers 2^k-21064046263 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 (21064046243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555748 + ... + 592438.

It is an arithmetic number, because the mean of its divisors is an integer number (984813280).

Almost surely, 2^21064046263 is an apocalyptic number.

21064046263 is a deficient number, since it is larger than the sum of its proper divisors (2571472457).

21064046263 is a wasteful number, since it uses less digits than its factorization.

21064046263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36839 (or 36826 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 21064046263 in words is "twenty-one billion, sixty-four million, forty-six thousand, two hundred sixty-three".