19724270659 has 16 divisors (see below), whose sum is σ = 20184850944. Its totient is φ = 19269432000.

The previous prime is 19724270647. The next prime is 19724270663. The reversal of 19724270659 is 95607242791.

It is a cyclic number.

It is not a de Polignac number, because 19724270659 - 2¹¹ = 19724268611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19724240659) 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, 4747327 + ... + 4751479.

It is an arithmetic number, because the mean of its divisors is an integer number (1261553184).

Almost surely, 2^19724270659 is an apocalyptic number.

19724270659 is a deficient number, since it is larger than the sum of its proper divisors (460580285).

19724270659 is a wasteful number, since it uses less digits than its factorization.

19724270659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 19724270659 in words is "nineteen billion, seven hundred twenty-four million, two hundred seventy thousand, six hundred fifty-nine".