19690680 has 32 divisors (see below), whose sum is σ = 59072400. Its totient is φ = 5250816.

The previous prime is 19690679. The next prime is 19690703. The reversal of 19690680 is 8609691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81925 + ... + 82164.

Almost surely, 2^19690680 is an apocalyptic number.

19690680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19690680 is an abundant number, since it is smaller than the sum of its proper divisors (39381720).

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

19690680 is a wasteful number, since it uses less digits than its factorization.

19690680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164103 (or 164099 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 19690680 is about 4437.4181682596. The cubic root of 19690680 is about 270.0351120318.

The spelling of 19690680 in words is "nineteen million, six hundred ninety thousand, six hundred eighty".