19869680 has 20 divisors (see below), whose sum is σ = 46197192. Its totient is φ = 7947840.

The previous prime is 19869679. The next prime is 19869683. The reversal of 19869680 is 8696891.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19869683) 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, 124106 + ... + 124265.

Almost surely, 2^19869680 is an apocalyptic number.

19869680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19869680 is an abundant number, since it is smaller than the sum of its proper divisors (26327512).

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

19869680 is a wasteful number, since it uses less digits than its factorization.

19869680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248384 (or 248378 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 19869680 is about 4457.5419235269. The cubic root of 19869680 is about 270.8509049480.

The spelling of 19869680 in words is "nineteen million, eight hundred sixty-nine thousand, six hundred eighty".