19925434368 has 432 divisors, whose sum is σ = 69792952320. Its totient is φ = 5350883328.

The previous prime is 19925434351. The next prime is 19925434379. The reversal of 19925434368 is 86343452991.

19925434368 is a `hidden beast` number, since 1 + 9 + 92 + 543 + 4 + 3 + 6 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156893121 + ... + 156893247.

It is an arithmetic number, because the mean of its divisors is an integer number (161557760).

Almost surely, 2^19925434368 is an apocalyptic number.

19925434368 is a gapful number since it is divisible by the number (18) 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 19925434368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34896476160).

19925434368 is an abundant number, since it is smaller than the sum of its proper divisors (49867517952).

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

19925434368 is an equidigital number, since it uses as much as digits as its factorization.

19925434368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 158 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 19925434368 in words is "nineteen billion, nine hundred twenty-five million, four hundred thirty-four thousand, three hundred sixty-eight".