9997020000 has 1080 divisors, whose sum is σ = 42876281448. Its totient is φ = 2280960000.

The previous prime is 9997019999. The next prime is 9997020067. The reversal of 9997020000 is 207999.

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 588059992 + ... + 588060008.

Almost surely, 2^9997020000 is an apocalyptic number.

9997020000 is a gapful number since it is divisible by the number (90) 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 9997020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21438140724).

9997020000 is an abundant number, since it is smaller than the sum of its proper divisors (32879261448).

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

9997020000 is a wasteful number, since it uses less digits than its factorization.

9997020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 9997020000 is about 99985.0988897846. The cubic root of 9997020000 is about 2154.2206615911.

Adding to 9997020000 its reverse (207999), we get a palindrome (9997227999).

The spelling of 9997020000 in words is "nine billion, nine hundred ninety-seven million, twenty thousand".