19812453888 has 160 divisors (see below), whose sum is σ = 56407237920. Its totient is φ = 6157762560.

The previous prime is 19812453847. The next prime is 19812453901. The reversal of 19812453888 is 88835421891.

It is a super-3 number, since 3×19812453888³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2842728 + ... + 2849688.

It is an arithmetic number, because the mean of its divisors is an integer number (352545237).

Almost surely, 2^19812453888 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 19812453888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28203618960).

19812453888 is an abundant number, since it is smaller than the sum of its proper divisors (36594784032).

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

19812453888 is a wasteful number, since it uses less digits than its factorization.

19812453888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108 (or 7092 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 57.

The spelling of 19812453888 in words is "nineteen billion, eight hundred twelve million, four hundred fifty-three thousand, eight hundred eighty-eight".