19821468 has 24 divisors (see below), whose sum is σ = 46560640. Its totient is φ = 6562800.

The previous prime is 19821449. The next prime is 19821497. The reversal of 19821468 is 86412891.

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, 3658 + ... + 7281.

Almost surely, 2^19821468 is an apocalyptic number.

It is an amenable number.

19821468 is an abundant number, since it is smaller than the sum of its proper divisors (26739172).

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

19821468 is a wasteful number, since it uses less digits than its factorization.

19821468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097 (or 11095 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 19821468 is about 4452.1307258435. The cubic root of 19821468 is about 270.6316623691.

The spelling of 19821468 in words is "nineteen million, eight hundred twenty-one thousand, four hundred sixty-eight".