19808268 has 24 divisors (see below), whose sum is σ = 46654272. Its totient is φ = 6540624.

The previous prime is 19808233. The next prime is 19808293. The reversal of 19808268 is 86280891.

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, 6430 + ... + 8997.

It is an arithmetic number, because the mean of its divisors is an integer number (1943928).

Almost surely, 2^19808268 is an apocalyptic number.

It is an amenable number.

19808268 is an abundant number, since it is smaller than the sum of its proper divisors (26846004).

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

19808268 is a wasteful number, since it uses less digits than its factorization.

19808268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15541 (or 15539 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 19808268 is about 4450.6480427012. The cubic root of 19808268 is about 270.5715737952.

The spelling of 19808268 in words is "nineteen million, eight hundred eight thousand, two hundred sixty-eight".