19268022818 has 18 divisors (see below), whose sum is σ = 31771912347. Its totient is φ = 8757210660.

The previous prime is 19268022811. The next prime is 19268022863. The reversal of 19268022818 is 81822086291.

It can be written as a sum of positive squares in only one way, i.e., 9634011409 + 9634011409 = 98153^2 + 98153^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=98153.

It is a super-2 number, since 2×19268022818² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19268022811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2154905 + ... + 2163827.

Almost surely, 2^19268022818 is an apocalyptic number.

19268022818 is a deficient number, since it is larger than the sum of its proper divisors (12503889529).

19268022818 is an frugal number, since it uses more digits than its factorization.

19268022818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17870 (or 8936 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 47.

The spelling of 19268022818 in words is "nineteen billion, two hundred sixty-eight million, twenty-two thousand, eight hundred eighteen".