21743062387 has 2 divisors, whose sum is σ = 21743062388. Its totient is φ = 21743062386.

The previous prime is 21743062291. The next prime is 21743062399. The reversal of 21743062387 is 78326034712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21743062387 is a prime.

It is not a weakly prime, because it can be changed into another prime (21743062687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10871531193 + 10871531194.

It is an arithmetic number, because the mean of its divisors is an integer number (10871531194).

Almost surely, 2^21743062387 is an apocalyptic number.

21743062387 is a deficient number, since it is larger than the sum of its proper divisors (1).

21743062387 is an equidigital number, since it uses as much as digits as its factorization.

21743062387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 21743062387 in words is "twenty-one billion, seven hundred forty-three million, sixty-two thousand, three hundred eighty-seven".