19628400000 has 384 divisors, whose sum is σ = 71140446720. Its totient is φ = 4755200000.

The previous prime is 19628399953. The next prime is 19628400007. The reversal of 19628400000 is 482691.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19628400007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13199257 + ... + 13200743.

It is an arithmetic number, because the mean of its divisors is an integer number (185261580).

Almost surely, 2^19628400000 is an apocalyptic number.

19628400000 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 19628400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35570223360).

19628400000 is an abundant number, since it is smaller than the sum of its proper divisors (51512046720).

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

19628400000 is an equidigital number, since it uses as much as digits as its factorization.

19628400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

Adding to 19628400000 its reverse (482691), we get a palindrome (19628882691).

The spelling of 19628400000 in words is "nineteen billion, six hundred twenty-eight million, four hundred thousand".