21244462711 has 4 divisors (see below), whose sum is σ = 21561544312. Its totient is φ = 20927381112.

The previous prime is 21244462699. The next prime is 21244462747. The reversal of 21244462711 is 11726444212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21244462711 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 (21244462411) 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, 158540700 + ... + 158540833.

It is an arithmetic number, because the mean of its divisors is an integer number (5390386078).

Almost surely, 2^21244462711 is an apocalyptic number.

21244462711 is a deficient number, since it is larger than the sum of its proper divisors (317081601).

21244462711 is an equidigital number, since it uses as much as digits as its factorization.

21244462711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317081600.

The product of its digits is 21504, while the sum is 34.

The spelling of 21244462711 in words is "twenty-one billion, two hundred forty-four million, four hundred sixty-two thousand, seven hundred eleven".