19454799936 has 224 divisors, whose sum is σ = 60849589248. Its totient is φ = 5408040960.

The previous prime is 19454799899. The next prime is 19454799937. The reversal of 19454799936 is 63999745491.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (19454799937) 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, 4583031 + ... + 4587273.

It is an arithmetic number, because the mean of its divisors is an integer number (271649952).

Almost surely, 2^19454799936 is an apocalyptic number.

19454799936 is a gapful number since it is divisible by the number (16) 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 19454799936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30424794624).

19454799936 is an abundant number, since it is smaller than the sum of its proper divisors (41394789312).

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

19454799936 is a wasteful number, since it uses less digits than its factorization.

19454799936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449 (or 4439 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 66.

The spelling of 19454799936 in words is "nineteen billion, four hundred fifty-four million, seven hundred ninety-nine thousand, nine hundred thirty-six".