19918692852 has 48 divisors (see below), whose sum is σ = 48744001152. Its totient is φ = 6318632320.

The previous prime is 19918692851. The next prime is 19918692877. The reversal of 19918692852 is 25829681991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19918692851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128799 + ... + 237542.

It is an arithmetic number, because the mean of its divisors is an integer number (1015500024).

Almost surely, 2^19918692852 is an apocalyptic number.

19918692852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19918692852 is an abundant number, since it is smaller than the sum of its proper divisors (28825308300).

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

19918692852 is a wasteful number, since it uses less digits than its factorization.

19918692852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366568 (or 366566 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 60.

The spelling of 19918692852 in words is "nineteen billion, nine hundred eighteen million, six hundred ninety-two thousand, eight hundred fifty-two".