19973099520 has 312 divisors, whose sum is σ = 75533077152. Its totient is φ = 4841472000.

The previous prime is 19973099483. The next prime is 19973099533. The reversal of 19973099520 is 2599037991.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2022595 + ... + 2032445.

It is an arithmetic number, because the mean of its divisors is an integer number (242093196).

Almost surely, 2^19973099520 is an apocalyptic number.

19973099520 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 19973099520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37766538576).

19973099520 is an abundant number, since it is smaller than the sum of its proper divisors (55559977632).

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

19973099520 is a wasteful number, since it uses less digits than its factorization.

19973099520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897 (or 9872 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The spelling of 19973099520 in words is "nineteen billion, nine hundred seventy-three million, ninety-nine thousand, five hundred twenty".