19794647040 has 192 divisors, whose sum is σ = 72374964480. Its totient is φ = 4524441600.

The previous prime is 19794647011. The next prime is 19794647069. The reversal of 19794647040 is 4074649791.

It is an interprime number because it is at equal distance from previous prime (19794647011) and next prime (19794647069).

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169015 + ... + 261065.

It is an arithmetic number, because the mean of its divisors is an integer number (376952940).

Almost surely, 2^19794647040 is an apocalyptic number.

19794647040 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 19794647040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36187482240).

19794647040 is an abundant number, since it is smaller than the sum of its proper divisors (52580317440).

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

19794647040 is an equidigital number, since it uses as much as digits as its factorization.

19794647040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92088 (or 92068 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 19794647040 in words is "nineteen billion, seven hundred ninety-four million, six hundred forty-seven thousand, forty".