19399541028 has 96 divisors (see below), whose sum is σ = 52819070976. Its totient is φ = 5426708352.

The previous prime is 19399540967. The next prime is 19399541033. The reversal of 19399541028 is 82014599391.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2235025 + ... + 2243687.

It is an arithmetic number, because the mean of its divisors is an integer number (550198656).

Almost surely, 2^19399541028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19399541028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26409535488).

19399541028 is an abundant number, since it is smaller than the sum of its proper divisors (33419529948).

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

19399541028 is a wasteful number, since it uses less digits than its factorization.

19399541028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233 (or 9231 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 19399541028 in words is "nineteen billion, three hundred ninety-nine million, five hundred forty-one thousand, twenty-eight".