19924601217 has 16 divisors (see below), whose sum is σ = 27188578560. Its totient is φ = 12971950992.

The previous prime is 19924601209. The next prime is 19924601219. The reversal of 19924601217 is 71210642991.

It is not a de Polignac number, because 19924601217 - 2³ = 19924601209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19924601219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1135134 + ... + 1152552.

It is an arithmetic number, because the mean of its divisors is an integer number (1699286160).

Almost surely, 2^19924601217 is an apocalyptic number.

It is an amenable number.

19924601217 is a deficient number, since it is larger than the sum of its proper divisors (7263977343).

19924601217 is a wasteful number, since it uses less digits than its factorization.

19924601217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26332.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 19924601217 in words is "nineteen billion, nine hundred twenty-four million, six hundred one thousand, two hundred seventeen".