19377820965 has 16 divisors (see below), whose sum is σ = 32352536448. Its totient is φ = 9885496896.

The previous prime is 19377820877. The next prime is 19377820997. The reversal of 19377820965 is 56902877391.

It is not a de Polignac number, because 19377820965 - 2¹⁰ = 19377819941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28083454 + ... + 28084143.

It is an arithmetic number, because the mean of its divisors is an integer number (2022033528).

Almost surely, 2^19377820965 is an apocalyptic number.

19377820965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19377820965 is a deficient number, since it is larger than the sum of its proper divisors (12974715483).

19377820965 is a wasteful number, since it uses less digits than its factorization.

19377820965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56167628.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 19377820965 in words is "nineteen billion, three hundred seventy-seven million, eight hundred twenty thousand, nine hundred sixty-five".