21711734783 has 4 divisors (see below), whose sum is σ = 21744984648. Its totient is φ = 21678484920.

The previous prime is 21711734767. The next prime is 21711734797. The reversal of 21711734783 is 38743711712.

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 21711734783 - 2⁴ = 21711734767 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 (21711734713) 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, 16623953 + ... + 16625258.

It is an arithmetic number, because the mean of its divisors is an integer number (5436246162).

Almost surely, 2^21711734783 is an apocalyptic number.

21711734783 is a deficient number, since it is larger than the sum of its proper divisors (33249865).

21711734783 is an equidigital number, since it uses as much as digits as its factorization.

21711734783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33249864.

The product of its digits is 197568, while the sum is 44.

The spelling of 21711734783 in words is "twenty-one billion, seven hundred eleven million, seven hundred thirty-four thousand, seven hundred eighty-three".