19622597408 has 18 divisors (see below), whose sum is σ = 38633548779. Its totient is φ = 9810902496.

The previous prime is 19622597387. The next prime is 19622597413. The reversal of 19622597408 is 80479522691.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 9811298704 + 9811298704 = 99052^2 + 99052^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99052.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19622597408.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 780035 + ... + 804797.

Almost surely, 2^19622597408 is an apocalyptic number.

It is an amenable number.

19622597408 is a deficient number, since it is larger than the sum of its proper divisors (19010951371).

19622597408 is an frugal number, since it uses more digits than its factorization.

19622597408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49536 (or 24765 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 19622597408 in words is "nineteen billion, six hundred twenty-two million, five hundred ninety-seven thousand, four hundred eight".