19986901452 has 108 divisors (see below), whose sum is σ = 58807135296. Its totient is φ = 5707033920.

The previous prime is 19986901421. The next prime is 19986901457. The reversal of 19986901452 is 25410968991.

19986901452 is a `hidden beast` number, since 19 + 98 + 6 + 90 + 1 + 452 = 666.

It is not an unprimeable number, because it can be changed into a prime (19986901457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4568338 + ... + 4572710.

It is an arithmetic number, because the mean of its divisors is an integer number (544510512).

Almost surely, 2^19986901452 is an apocalyptic number.

19986901452 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 19986901452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29403567648).

19986901452 is an abundant number, since it is smaller than the sum of its proper divisors (38820233844).

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

19986901452 is a wasteful number, since it uses less digits than its factorization.

19986901452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6988 (or 6976 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 19986901452 in words is "nineteen billion, nine hundred eighty-six million, nine hundred one thousand, four hundred fifty-two".