19221285505 has 16 divisors (see below), whose sum is σ = 23157388800. Its totient is φ = 15315912000.

The previous prime is 19221285497. The next prime is 19221285527. The reversal of 19221285505 is 50558212291.

It is not a de Polignac number, because 19221285505 - 2³ = 19221285497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1454116 + ... + 1467274.

It is an arithmetic number, because the mean of its divisors is an integer number (1447336800).

Almost surely, 2^19221285505 is an apocalyptic number.

It is an amenable number.

19221285505 is a deficient number, since it is larger than the sum of its proper divisors (3936103295).

19221285505 is a wasteful number, since it uses less digits than its factorization.

19221285505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14304.

The product of its (nonzero) digits is 72000, while the sum is 40.

Adding to 19221285505 its reverse (50558212291), we get a palindrome (69779497796).

The spelling of 19221285505 in words is "nineteen billion, two hundred twenty-one million, two hundred eighty-five thousand, five hundred five".