19863213852 has 24 divisors (see below), whose sum is σ = 48786841600. Its totient is φ = 6272593776.

The previous prime is 19863213847. The next prime is 19863213859. The reversal of 19863213852 is 25831236891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19863213859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43559452 + ... + 43559907.

Almost surely, 2^19863213852 is an apocalyptic number.

19863213852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19863213852 is an abundant number, since it is smaller than the sum of its proper divisors (28923627748).

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

19863213852 is a wasteful number, since it uses less digits than its factorization.

19863213852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87119385 (or 87119383 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The spelling of 19863213852 in words is "nineteen billion, eight hundred sixty-three million, two hundred thirteen thousand, eight hundred fifty-two".