21943767283 has 2 divisors, whose sum is σ = 21943767284. Its totient is φ = 21943767282.

The previous prime is 21943767277. The next prime is 21943767319. The reversal of 21943767283 is 38276734912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21943767283 - 2⁹ = 21943766771 is a prime.

It is a super-2 number, since 2×21943767283² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21943767283.

It is not a weakly prime, because it can be changed into another prime (21943767253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10971883641 + 10971883642.

It is an arithmetic number, because the mean of its divisors is an integer number (10971883642).

Almost surely, 2^21943767283 is an apocalyptic number.

21943767283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21943767283 is an equidigital number, since it uses as much as digits as its factorization.

21943767283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The spelling of 21943767283 in words is "twenty-one billion, nine hundred forty-three million, seven hundred sixty-seven thousand, two hundred eighty-three".