19812648 has 16 divisors (see below), whose sum is σ = 49531680. Its totient is φ = 6604208.

The previous prime is 19812607. The next prime is 19812677. The reversal of 19812648 is 84621891.

It is a super-3 number, since 3×19812648³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412740 + ... + 412787.

It is an arithmetic number, because the mean of its divisors is an integer number (3095730).

Almost surely, 2^19812648 is an apocalyptic number.

It is an amenable number.

19812648 is an abundant number, since it is smaller than the sum of its proper divisors (29719032).

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

19812648 is a wasteful number, since it uses less digits than its factorization.

19812648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825536 (or 825532 counting only the distinct ones).

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

The square root of 19812648 is about 4451.1400786765. The cubic root of 19812648 is about 270.5915152351.

The spelling of 19812648 in words is "nineteen million, eight hundred twelve thousand, six hundred forty-eight".