19409342764 has 144 divisors (see below), whose sum is σ = 44466347520. Its totient is φ = 7352674560.

The previous prime is 19409342753. The next prime is 19409342819. The reversal of 19409342764 is 46724390491.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3508969 + ... + 3514495.

It is an arithmetic number, because the mean of its divisors is an integer number (308794080).

Almost surely, 2^19409342764 is an apocalyptic number.

19409342764 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 19409342764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22233173760).

19409342764 is an abundant number, since it is smaller than the sum of its proper divisors (25057004756).

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

19409342764 is a wasteful number, since it uses less digits than its factorization.

19409342764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5619 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 19409342764 in words is "nineteen billion, four hundred nine million, three hundred forty-two thousand, seven hundred sixty-four".