21037963711 has 4 divisors (see below), whose sum is σ = 21382848424. Its totient is φ = 20693079000.

The previous prime is 21037963657. The next prime is 21037963729. The reversal of 21037963711 is 11736973012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21037963711 - 2¹¹ = 21037961663 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 (21037963511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172442265 + ... + 172442386.

It is an arithmetic number, because the mean of its divisors is an integer number (5345712106).

Almost surely, 2^21037963711 is an apocalyptic number.

21037963711 is a deficient number, since it is larger than the sum of its proper divisors (344884713).

21037963711 is an equidigital number, since it uses as much as digits as its factorization.

21037963711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344884712.

The product of its (nonzero) digits is 47628, while the sum is 40.

The spelling of 21037963711 in words is "twenty-one billion, thirty-seven million, nine hundred sixty-three thousand, seven hundred eleven".