21743714427 has 4 divisors (see below), whose sum is σ = 28991619240. Its totient is φ = 14495809616.

The previous prime is 21743714407. The next prime is 21743714431. The reversal of 21743714427 is 72441734712.

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 21743714427 - 2²³ = 21735325819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21743714407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3623952402 + ... + 3623952407.

It is an arithmetic number, because the mean of its divisors is an integer number (7247904810).

Almost surely, 2^21743714427 is an apocalyptic number.

21743714427 is a deficient number, since it is larger than the sum of its proper divisors (7247904813).

21743714427 is an equidigital number, since it uses as much as digits as its factorization.

21743714427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247904812.

The product of its digits is 263424, while the sum is 42.

The spelling of 21743714427 in words is "twenty-one billion, seven hundred forty-three million, seven hundred fourteen thousand, four hundred twenty-seven".