19497275028 has 216 divisors, whose sum is σ = 62725519584. Its totient is φ = 5049475200.

The previous prime is 19497275003. The next prime is 19497275029. The reversal of 19497275028 is 82057279491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19497275029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7702123 + ... + 7704653.

It is an arithmetic number, because the mean of its divisors is an integer number (290395924).

Almost surely, 2^19497275028 is an apocalyptic number.

19497275028 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 19497275028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31362759792).

19497275028 is an abundant number, since it is smaller than the sum of its proper divisors (43228244556).

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

19497275028 is a wasteful number, since it uses less digits than its factorization.

19497275028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963 (or 2951 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 19497275028 in words is "nineteen billion, four hundred ninety-seven million, two hundred seventy-five thousand, twenty-eight".