19744772680 has 32 divisors (see below), whose sum is σ = 45458899200. Its totient is φ = 7714236096.

The previous prime is 19744772669. The next prime is 19744772701. The reversal of 19744772680 is 8627744791.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5738040 + ... + 5741479.

It is an arithmetic number, because the mean of its divisors is an integer number (1420590600).

Almost surely, 2^19744772680 is an apocalyptic number.

19744772680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19744772680 is an abundant number, since it is smaller than the sum of its proper divisors (25714126520).

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

19744772680 is a wasteful number, since it uses less digits than its factorization.

19744772680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11479573 (or 11479569 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 19744772680 in words is "nineteen billion, seven hundred forty-four million, seven hundred seventy-two thousand, six hundred eighty".