19812453848 has 48 divisors (see below), whose sum is σ = 40860696240. Its totient is φ = 8999439680.

The previous prime is 19812453847. The next prime is 19812453901. The reversal of 19812453848 is 84835421891.

It is a super-3 number, since 3×19812453848³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19812453848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19812453841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1578365 + ... + 1590867.

It is an arithmetic number, because the mean of its divisors is an integer number (851264505).

Almost surely, 2^19812453848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19812453848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20430348120).

19812453848 is an abundant number, since it is smaller than the sum of its proper divisors (21048242392).

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

19812453848 is a wasteful number, since it uses less digits than its factorization.

19812453848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168 (or 14153 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 53.

The spelling of 19812453848 in words is "nineteen billion, eight hundred twelve million, four hundred fifty-three thousand, eight hundred forty-eight".