19849575745 has 32 divisors (see below), whose sum is σ = 25035816960. Its totient is φ = 15089718720.

The previous prime is 19849575731. The next prime is 19849575761. The reversal of 19849575745 is 54757594891.

It is not a de Polignac number, because 19849575745 - 2¹³ = 19849567553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2143836 + ... + 2153074.

It is an arithmetic number, because the mean of its divisors is an integer number (782369280).

Almost surely, 2^19849575745 is an apocalyptic number.

It is an amenable number.

19849575745 is a deficient number, since it is larger than the sum of its proper divisors (5186241215).

19849575745 is a wasteful number, since it uses less digits than its factorization.

19849575745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525.

The product of its digits is 63504000, while the sum is 64.

The spelling of 19849575745 in words is "nineteen billion, eight hundred forty-nine million, five hundred seventy-five thousand, seven hundred forty-five".