19780932969 has 80 divisors (see below), whose sum is σ = 34117585920. Its totient is φ = 11187953280.

The previous prime is 19780932937. The next prime is 19780932989. The reversal of 19780932969 is 96923908791.

It is a happy number.

It is not a de Polignac number, because 19780932969 - 2⁵ = 19780932937 is a prime.

It is a super-2 number, since 2×19780932969² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19780932989) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 41296072 + ... + 41296550.

It is an arithmetic number, because the mean of its divisors is an integer number (426469824).

Almost surely, 2^19780932969 is an apocalyptic number.

It is an amenable number.

19780932969 is a deficient number, since it is larger than the sum of its proper divisors (14336652951).

19780932969 is a wasteful number, since it uses less digits than its factorization.

19780932969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 19780932969 in words is "nineteen billion, seven hundred eighty million, nine hundred thirty-two thousand, nine hundred sixty-nine".