19500664272 has 80 divisors (see below), whose sum is σ = 51234970752. Its totient is φ = 6390374400.

The previous prime is 19500664259. The next prime is 19500664273. The reversal of 19500664272 is 27246600591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19500664273) 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 15 ways as a sum of consecutive naturals, for example, 689188 + ... + 716924.

Almost surely, 2^19500664272 is an apocalyptic number.

19500664272 is a gapful number since it is divisible by the number (12) 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 19500664272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25617485376).

19500664272 is an abundant number, since it is smaller than the sum of its proper divisors (31734306480).

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

19500664272 is a wasteful number, since it uses less digits than its factorization.

19500664272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27996 (or 27990 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 19500664272 in words is "nineteen billion, five hundred million, six hundred sixty-four thousand, two hundred seventy-two".