19769680 has 80 divisors (see below), whose sum is σ = 53817984. Its totient is φ = 6612480.

The previous prime is 19769669. The next prime is 19769681. The reversal of 19769680 is 8696791.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 19769680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19769681) by changing a digit.

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, 23670 + ... + 24490.

Almost surely, 2^19769680 is an apocalyptic number.

19769680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19769680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26908992).

19769680 is an abundant number, since it is smaller than the sum of its proper divisors (34048304).

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

19769680 is a wasteful number, since it uses less digits than its factorization.

19769680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 19769680 is about 4446.3108303401. The cubic root of 19769680 is about 270.3957616366.

It can be divided in two parts, 19769 and 680, that added together give a square (20449 = 143²).

The spelling of 19769680 in words is "nineteen million, seven hundred sixty-nine thousand, six hundred eighty".