19897774300 has 36 divisors (see below), whose sum is σ = 44096865120. Its totient is φ = 7789765120.

The previous prime is 19897774231. The next prime is 19897774307. The reversal of 19897774300 is 347779891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19897774307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112085 + ... + 2121484.

It is an arithmetic number, because the mean of its divisors is an integer number (1224912920).

Almost surely, 2^19897774300 is an apocalyptic number.

19897774300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19897774300 is an abundant number, since it is smaller than the sum of its proper divisors (24199090820).

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

19897774300 is a wasteful number, since it uses less digits than its factorization.

19897774300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233630 (or 4233623 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 55.

The spelling of 19897774300 in words is "nineteen billion, eight hundred ninety-seven million, seven hundred seventy-four thousand, three hundred".