17922840494 has 32 divisors (see below), whose sum is σ = 29421826560. Its totient is φ = 8138240352.

The previous prime is 17922840487. The next prime is 17922840497. The reversal of 17922840494 is 49404822971.

It is a super-2 number, since 2×17922840494² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17922840497) 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 15 ways as a sum of consecutive naturals, for example, 1455407 + ... + 1467669.

It is an arithmetic number, because the mean of its divisors is an integer number (919432080).

Almost surely, 2^17922840494 is an apocalyptic number.

17922840494 is a deficient number, since it is larger than the sum of its proper divisors (11498986066).

17922840494 is a wasteful number, since it uses less digits than its factorization.

17922840494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13184.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 17922840494 in words is "seventeen billion, nine hundred twenty-two million, eight hundred forty thousand, four hundred ninety-four".