21783353711 has 12 divisors (see below), whose sum is σ = 25467166800. Its totient is φ = 18577611360.

The previous prime is 21783353701. The next prime is 21783353803. The reversal of 21783353711 is 11735338712.

It is not a de Polignac number, because 21783353711 - 2¹⁰ = 21783352687 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 (21783353701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1107230 + ... + 1126731.

It is an arithmetic number, because the mean of its divisors is an integer number (2122263900).

Almost surely, 2^21783353711 is an apocalyptic number.

21783353711 is a deficient number, since it is larger than the sum of its proper divisors (3683813089).

21783353711 is a wasteful number, since it uses less digits than its factorization.

21783353711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234174 (or 2234167 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The spelling of 21783353711 in words is "twenty-one billion, seven hundred eighty-three million, three hundred fifty-three thousand, seven hundred eleven".