19649039412 has 24 divisors (see below), whose sum is σ = 45865324512. Its totient is φ = 6547170400.

The previous prime is 19649039393. The next prime is 19649039413. The reversal of 19649039412 is 21493094691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19649039413) 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, 280914 + ... + 343817.

It is an arithmetic number, because the mean of its divisors is an integer number (1911055188).

Almost surely, 2^19649039412 is an apocalyptic number.

19649039412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19649039412 is an abundant number, since it is smaller than the sum of its proper divisors (26216285100).

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

19649039412 is a wasteful number, since it uses less digits than its factorization.

19649039412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627359 (or 627357 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 19649039412 in words is "nineteen billion, six hundred forty-nine million, thirty-nine thousand, four hundred twelve".