19695500028 has 48 divisors (see below), whose sum is σ = 51110831520. Its totient is φ = 6558940800.

The previous prime is 19695500021. The next prime is 19695500063. The reversal of 19695500028 is 82000559691.

19695500028 is a `hidden beast` number, since 1 + 96 + 9 + 550 + 0 + 0 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19695500021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28648 + ... + 200528.

It is an arithmetic number, because the mean of its divisors is an integer number (1064808990).

Almost surely, 2^19695500028 is an apocalyptic number.

19695500028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19695500028 is an abundant number, since it is smaller than the sum of its proper divisors (31415331492).

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

19695500028 is a wasteful number, since it uses less digits than its factorization.

19695500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172955 (or 172947 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 19695500028 in words is "nineteen billion, six hundred ninety-five million, five hundred thousand, twenty-eight".