9990021330 has 32 divisors (see below), whose sum is σ = 26640057600. Its totient is φ = 2664005616.

The previous prime is 9990021299. The next prime is 9990021331. The reversal of 9990021330 is 331200999.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9990021331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18499770 + ... + 18500309.

It is an arithmetic number, because the mean of its divisors is an integer number (832501800).

Almost surely, 2^9990021330 is an apocalyptic number.

9990021330 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9990021330 is an abundant number, since it is smaller than the sum of its proper divisors (16650036270).

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

9990021330 is a wasteful number, since it uses less digits than its factorization.

9990021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37000095 (or 37000089 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 9990021330 is about 99950.0941970542. The cubic root of 9990021330 is about 2153.7178384445.

The spelling of 9990021330 in words is "nine billion, nine hundred ninety million, twenty-one thousand, three hundred thirty".