19649159824 has 40 divisors (see below), whose sum is σ = 43535838528. Its totient is φ = 8415845760.

The previous prime is 19649159821. The next prime is 19649159851. The reversal of 19649159824 is 42895194691.

It is not an unprimeable number, because it can be changed into a prime (19649159821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129759 + ... + 236929.

Almost surely, 2^19649159824 is an apocalyptic number.

19649159824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19649159824 is an abundant number, since it is smaller than the sum of its proper divisors (23886678704).

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

19649159824 is a wasteful number, since it uses less digits than its factorization.

19649159824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108823 (or 108817 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The spelling of 19649159824 in words is "nineteen billion, six hundred forty-nine million, one hundred fifty-nine thousand, eight hundred twenty-four".