21382308711 has 48 divisors (see below), whose sum is σ = 33668425440. Its totient is φ = 13032264960.

The previous prime is 21382308707. The next prime is 21382308719. The reversal of 21382308711 is 11780328312.

It is not a de Polignac number, because 21382308711 - 2² = 21382308707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21382308719) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533505 + ... + 572181.

It is an arithmetic number, because the mean of its divisors is an integer number (701425530).

Almost surely, 2^21382308711 is an apocalyptic number.

21382308711 is a deficient number, since it is larger than the sum of its proper divisors (12286116729).

21382308711 is a wasteful number, since it uses less digits than its factorization.

21382308711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38816 (or 38813 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 21382308711 in words is "twenty-one billion, three hundred eighty-two million, three hundred eight thousand, seven hundred eleven".