19269901728 has 384 divisors, whose sum is σ = 70541936640. Its totient is φ = 4971663360.

The previous prime is 19269901709. The next prime is 19269901771. The reversal of 19269901728 is 82710996291.

It is a super-2 number, since 2×19269901728² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10843176 + ... + 10844952.

It is an arithmetic number, because the mean of its divisors is an integer number (183702960).

Almost surely, 2^19269901728 is an apocalyptic number.

19269901728 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 19269901728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35270968320).

19269901728 is an abundant number, since it is smaller than the sum of its proper divisors (51272034912).

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

19269901728 is a wasteful number, since it uses less digits than its factorization.

19269901728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 19269901728 in words is "nineteen billion, two hundred sixty-nine million, nine hundred one thousand, seven hundred twenty-eight".