19811341700 has 36 divisors (see below), whose sum is σ = 43801766820. Its totient is φ = 7775015040.

The previous prime is 19811341681. The next prime is 19811341729. The reversal of 19811341700 is 714311891.

It can be written as a sum of positive squares in 6 ways, for example, as 1177999684 + 18633342016 = 34322^2 + 136504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1863695 + ... + 1874294.

It is an arithmetic number, because the mean of its divisors is an integer number (1216715745).

Almost surely, 2^19811341700 is an apocalyptic number.

19811341700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19811341700 is an abundant number, since it is smaller than the sum of its proper divisors (23990425120).

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

19811341700 is a wasteful number, since it uses less digits than its factorization.

19811341700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738056 (or 3738049 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 19811341700 in words is "nineteen billion, eight hundred eleven million, three hundred forty-one thousand, seven hundred".