19217676980 has 12 divisors (see below), whose sum is σ = 40357121700. Its totient is φ = 7687070784.

The previous prime is 19217676923. The next prime is 19217676983. The reversal of 19217676980 is 8967671291.

It can be written as a sum of positive squares in 2 ways, for example, as 6538016164 + 12679660816 = 80858^2 + 112604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19217676983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480441905 + ... + 480441944.

It is an arithmetic number, because the mean of its divisors is an integer number (3363093475).

Almost surely, 2^19217676980 is an apocalyptic number.

19217676980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19217676980 is an abundant number, since it is smaller than the sum of its proper divisors (21139444720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19217676980 is a wasteful number, since it uses less digits than its factorization.

19217676980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960883858 (or 960883856 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 19217676980 in words is "nineteen billion, two hundred seventeen million, six hundred seventy-six thousand, nine hundred eighty".