19687494960 has 640 divisors, whose sum is σ = 80326287360. Its totient is φ = 4338883584.

The previous prime is 19687494941. The next prime is 19687494961. The reversal of 19687494960 is 6949478691.

19687494960 is a `hidden beast` number, since 1 + 9 + 6 + 87 + 494 + 9 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (19687494961) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 69566979 + ... + 69567261.

It is an arithmetic number, because the mean of its divisors is an integer number (125509824).

Almost surely, 2^19687494960 is an apocalyptic number.

19687494960 is a gapful number since it is divisible by the number (10) 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 19687494960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40163143680).

19687494960 is an abundant number, since it is smaller than the sum of its proper divisors (60638792400).

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

19687494960 is a wasteful number, since it uses less digits than its factorization.

19687494960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 19687494960 in words is "nineteen billion, six hundred eighty-seven million, four hundred ninety-four thousand, nine hundred sixty".