21743523011711 has 4 divisors (see below), whose sum is σ = 21743543181312. Its totient is φ = 21743502842112.

The previous prime is 21743523011659. The next prime is 21743523011713. The reversal of 21743523011711 is 11711032534712.

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 21743523011711 - 2³⁴ = 21726343142527 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 (21743523011713) 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, 8370626 + ... + 10656191.

It is an arithmetic number, because the mean of its divisors is an integer number (5435885795328).

Almost surely, 2^{21743523011711} is an apocalyptic number.

21743523011711 is a deficient number, since it is larger than the sum of its proper divisors (20169601).

21743523011711 is a wasteful number, since it uses less digits than its factorization.

21743523011711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20169600.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 21743523011711 in words is "twenty-one trillion, seven hundred forty-three billion, five hundred twenty-three million, eleven thousand, seven hundred eleven".