19924736887 has 12 divisors (see below), whose sum is σ = 22209214608. Its totient is φ = 17858271200.

The previous prime is 19924736879. The next prime is 19924736917. The reversal of 19924736887 is 78863742991.

It is not a de Polignac number, because 19924736887 - 2³ = 19924736879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19924736827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1151038 + ... + 1168219.

It is an arithmetic number, because the mean of its divisors is an integer number (1850767884).

Almost surely, 2^19924736887 is an apocalyptic number.

19924736887 is a deficient number, since it is larger than the sum of its proper divisors (2284477721).

19924736887 is a wasteful number, since it uses less digits than its factorization.

19924736887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319350 (or 2319339 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 64.

The spelling of 19924736887 in words is "nineteen billion, nine hundred twenty-four million, seven hundred thirty-six thousand, eight hundred eighty-seven".