21071963703 has 16 divisors (see below), whose sum is σ = 32127664640. Its totient is φ = 12034370016.

The previous prime is 21071963669. The next prime is 21071963719. The reversal of 21071963703 is 30736917012.

It is a happy number.

It is not a de Polignac number, because 21071963703 - 2¹² = 21071959607 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 (21071963903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242875 + ... + 318012.

It is an arithmetic number, because the mean of its divisors is an integer number (2007979040).

Almost surely, 2^21071963703 is an apocalyptic number.

21071963703 is a deficient number, since it is larger than the sum of its proper divisors (11055700937).

21071963703 is a wasteful number, since it uses less digits than its factorization.

21071963703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562686.

The product of its (nonzero) digits is 47628, while the sum is 39.

The spelling of 21071963703 in words is "twenty-one billion, seventy-one million, nine hundred sixty-three thousand, seven hundred three".