19518076872 has 224 divisors, whose sum is σ = 63277879680. Its totient is φ = 5525936640.

The previous prime is 19518076813. The next prime is 19518076883. The reversal of 19518076872 is 27867081591.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4610997 + ... + 4615227.

Almost surely, 2^19518076872 is an apocalyptic number.

19518076872 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 19518076872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31638939840).

19518076872 is an abundant number, since it is smaller than the sum of its proper divisors (43759802808).

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

19518076872 is a wasteful number, since it uses less digits than its factorization.

19518076872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375 (or 4356 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 19518076872 in words is "nineteen billion, five hundred eighteen million, seventy-six thousand, eight hundred seventy-two".