22019793977 has 2 divisors, whose sum is σ = 22019793978. Its totient is φ = 22019793976.

The previous prime is 22019793911. The next prime is 22019794001. The reversal of 22019793977 is 77939791022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22004458921 + 15335056 = 148339^2 + 3916^2 .

It is a cyclic number.

It is not a de Polignac number, because 22019793977 - 2¹⁰ = 22019792953 is a prime.

It is not a weakly prime, because it can be changed into another prime (22019793577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009896988 + 11009896989.

It is an arithmetic number, because the mean of its divisors is an integer number (11009896989).

Almost surely, 2^22019793977 is an apocalyptic number.

It is an amenable number.

22019793977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22019793977 is an equidigital number, since it uses as much as digits as its factorization.

22019793977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The spelling of 22019793977 in words is "twenty-two billion, nineteen million, seven hundred ninety-three thousand, nine hundred seventy-seven".