19452159840 has 192 divisors, whose sum is σ = 64120896000. Its totient is φ = 4947554304.

The previous prime is 19452159829. The next prime is 19452159847. The reversal of 19452159840 is 4895125491.

It is a Cunningham number, because it is equal to 139471²-1.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 19452159840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19452159847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4181836 + ... + 4186484.

It is an arithmetic number, because the mean of its divisors is an integer number (333963000).

Almost surely, 2^19452159840 is an apocalyptic number.

19452159840 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 19452159840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32060448000).

19452159840 is an abundant number, since it is smaller than the sum of its proper divisors (44668736160).

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

19452159840 is a wasteful number, since it uses less digits than its factorization.

19452159840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5069 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The spelling of 19452159840 in words is "nineteen billion, four hundred fifty-two million, one hundred fifty-nine thousand, eight hundred forty".