9999020503 has 8 divisors (see below), whose sum is σ = 10629497520. Its totient is φ = 9378964800.

The previous prime is 9999020443. The next prime is 9999020533. The reversal of 9999020503 is 3050209999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9999020503 - 2⁹ = 9999019991 is a prime.

It is a super-2 number, since 2×9999020503² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999020533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603350 + ... + 2607187.

It is an arithmetic number, because the mean of its divisors is an integer number (1328687190).

Almost surely, 2^9999020503 is an apocalyptic number.

9999020503 is a deficient number, since it is larger than the sum of its proper divisors (630477017).

9999020503 is a wasteful number, since it uses less digits than its factorization.

9999020503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210657.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 9999020503 is about 99995.1023950673. The cubic root of 9999020503 is about 2154.3643456579.

The spelling of 9999020503 in words is "nine billion, nine hundred ninety-nine million, twenty thousand, five hundred three".