19379693505 has 16 divisors (see below), whose sum is σ = 31010558400. Its totient is φ = 10334820288.

The previous prime is 19379693503. The next prime is 19379693539. The reversal of 19379693505 is 50539697391.

It is a happy number.

It is not a de Polignac number, because 19379693505 - 2¹ = 19379693503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19379693503) 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, 109294 + ... + 225176.

It is an arithmetic number, because the mean of its divisors is an integer number (1938159900).

Almost surely, 2^19379693505 is an apocalyptic number.

19379693505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19379693505 is a deficient number, since it is larger than the sum of its proper divisors (11630864895).

19379693505 is a wasteful number, since it uses less digits than its factorization.

19379693505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127040.

The product of its (nonzero) digits is 6889050, while the sum is 57.

The spelling of 19379693505 in words is "nineteen billion, three hundred seventy-nine million, six hundred ninety-three thousand, five hundred five".