19008642744 has 576 divisors, whose sum is σ = 68844072960. Its totient is φ = 4625786880.

The previous prime is 19008642707. The next prime is 19008642901. The reversal of 19008642744 is 44724680091.

It is a super-2 number, since 2×19008642744² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19008642744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 60730332 + ... + 60730644.

It is an arithmetic number, because the mean of its divisors is an integer number (119520960).

Almost surely, 2^19008642744 is an apocalyptic number.

19008642744 is a gapful number since it is divisible by the number (14) 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 19008642744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34422036480).

19008642744 is an abundant number, since it is smaller than the sum of its proper divisors (49835430216).

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

19008642744 is a wasteful number, since it uses less digits than its factorization.

19008642744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 19008642744 in words is "nineteen billion, eight million, six hundred forty-two thousand, seven hundred forty-four".