19518074905 has 32 divisors (see below), whose sum is σ = 27041817600. Its totient is φ = 13246964160.

The previous prime is 19518074879. The next prime is 19518074909. The reversal of 19518074905 is 50947081591.

It is not a de Polignac number, because 19518074905 - 2¹¹ = 19518072857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19518074909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7230246 + ... + 7232944.

It is an arithmetic number, because the mean of its divisors is an integer number (845056800).

Almost surely, 2^19518074905 is an apocalyptic number.

It is an amenable number.

19518074905 is a deficient number, since it is larger than the sum of its proper divisors (7523742695).

19518074905 is a wasteful number, since it uses less digits than its factorization.

19518074905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 19518074905 in words is "nineteen billion, five hundred eighteen million, seventy-four thousand, nine hundred five".