19986041250 has 400 divisors, whose sum is σ = 64720332864. Its totient is φ = 4513968000.

The previous prime is 19986041197. The next prime is 19986041267. The reversal of 19986041250 is 5214068991.

19986041250 is a `hidden beast` number, since 19 + 9 + 8 + 604 + 1 + 25 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 19986041196 and 19986041205.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 115526164 + ... + 115526336.

Almost surely, 2^19986041250 is an apocalyptic number.

19986041250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19986041250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32360166432).

19986041250 is an abundant number, since it is smaller than the sum of its proper divisors (44734291614).

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

19986041250 is a wasteful number, since it uses less digits than its factorization.

19986041250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 19986041250 in words is "nineteen billion, nine hundred eighty-six million, forty-one thousand, two hundred fifty".