19801089792 has 432 divisors, whose sum is σ = 66249146880. Its totient is φ = 5785344000.

The previous prime is 19801089739. The next prime is 19801089797. The reversal of 19801089792 is 29798010891.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19801089797) 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, 73066617 + ... + 73066887.

Almost surely, 2^19801089792 is an apocalyptic number.

19801089792 is a gapful number since it is divisible by the number (12) 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 19801089792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33124573440).

19801089792 is an abundant number, since it is smaller than the sum of its proper divisors (46448057088).

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

19801089792 is a wasteful number, since it uses less digits than its factorization.

19801089792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 54.

The spelling of 19801089792 in words is "nineteen billion, eight hundred one million, eighty-nine thousand, seven hundred ninety-two".