19808468 has 24 divisors (see below), whose sum is σ = 37700712. Its totient is φ = 9068544.

The previous prime is 19808449. The next prime is 19808491. The reversal of 19808468 is 86480891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3952144 + 15856324 = 1988^2 + 3982^2 .

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, 1421 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (1570863).

Almost surely, 2^19808468 is an apocalyptic number.

It is an amenable number.

19808468 is a deficient number, since it is larger than the sum of its proper divisors (17892244).

19808468 is a wasteful number, since it uses less digits than its factorization.

19808468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 19808468 is about 4450.6705112825. The cubic root of 19808468 is about 270.5724844273.

The spelling of 19808468 in words is "nineteen million, eight hundred eight thousand, four hundred sixty-eight".