19722738418 has 32 divisors (see below), whose sum is σ = 31529347200. Its totient is φ = 9232646016.

The previous prime is 19722738389. The next prime is 19722738419. The reversal of 19722738418 is 81483722791.

It is not an unprimeable number, because it can be changed into a prime (19722738419) 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, 616768 + ... + 647956.

It is an arithmetic number, because the mean of its divisors is an integer number (985292100).

Almost surely, 2^19722738418 is an apocalyptic number.

19722738418 is a deficient number, since it is larger than the sum of its proper divisors (11806608782).

19722738418 is a wasteful number, since it uses less digits than its factorization.

19722738418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31506.

The product of its digits is 1354752, while the sum is 52.

The spelling of 19722738418 in words is "nineteen billion, seven hundred twenty-two million, seven hundred thirty-eight thousand, four hundred eighteen".