19883478012 has 96 divisors (see below), whose sum is σ = 48900063744. Its totient is φ = 6276019200.

The previous prime is 19883477963. The next prime is 19883478031. The reversal of 19883478012 is 21087438891.

It is a super-3 number, since 3×19883478012³ (a number of 32 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26127712 + ... + 26128472.

It is an arithmetic number, because the mean of its divisors is an integer number (509375664).

Almost surely, 2^19883478012 is an apocalyptic number.

19883478012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19883478012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24450031872).

19883478012 is an abundant number, since it is smaller than the sum of its proper divisors (29016585732).

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

19883478012 is a wasteful number, since it uses less digits than its factorization.

19883478012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 19883478012 in words is "nineteen billion, eight hundred eighty-three million, four hundred seventy-eight thousand, twelve".