21773390143 has 2 divisors, whose sum is σ = 21773390144. Its totient is φ = 21773390142.

The previous prime is 21773390141. The next prime is 21773390147. The reversal of 21773390143 is 34109337712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21773390143 - 2¹ = 21773390141 is a prime.

Together with 21773390141, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21773390096 and 21773390105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21773390141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10886695071 + 10886695072.

It is an arithmetic number, because the mean of its divisors is an integer number (10886695072).

Almost surely, 2^21773390143 is an apocalyptic number.

21773390143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21773390143 is an equidigital number, since it uses as much as digits as its factorization.

21773390143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 40.

The spelling of 21773390143 in words is "twenty-one billion, seven hundred seventy-three million, three hundred ninety thousand, one hundred forty-three".