22019936557 has 2 divisors, whose sum is σ = 22019936558. Its totient is φ = 22019936556.

The previous prime is 22019936537. The next prime is 22019936567. The reversal of 22019936557 is 75563991022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22013953641 + 5982916 = 148371^2 + 2446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22019936557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22019936557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22019936507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009968278 + 11009968279.

It is an arithmetic number, because the mean of its divisors is an integer number (11009968279).

Almost surely, 2^22019936557 is an apocalyptic number.

It is an amenable number.

22019936557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22019936557 is an equidigital number, since it uses as much as digits as its factorization.

22019936557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 22019936557 in words is "twenty-two billion, nineteen million, nine hundred thirty-six thousand, five hundred fifty-seven".