19385351040 has 512 divisors, whose sum is σ = 70375495680. Its totient is φ = 4497408000.

The previous prime is 19385350987. The next prime is 19385351057. The reversal of 19385351040 is 4015358391.

It is a self number, because there is not a number n which added to its sum of digits gives 19385351040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52820937 + ... + 52821303.

It is an arithmetic number, because the mean of its divisors is an integer number (137452140).

Almost surely, 2^19385351040 is an apocalyptic number.

19385351040 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 19385351040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35187747840).

19385351040 is an abundant number, since it is smaller than the sum of its proper divisors (50990144640).

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

19385351040 is a wasteful number, since it uses less digits than its factorization.

19385351040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 19385351040 in words is "nineteen billion, three hundred eighty-five million, three hundred fifty-one thousand, forty".