8903910021 has 16 divisors (see below), whose sum is σ = 12585595968. Its totient is φ = 5579936000.

The previous prime is 8903909999. The next prime is 8903910031. The reversal of 8903910021 is 1200193098.

It is a cyclic number.

It is not a de Polignac number, because 8903910021 - 2²⁶ = 8836801157 is a prime.

It is a super-2 number, since 2×8903910021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8903910031) 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, 64455 + ... + 148196.

It is an arithmetic number, because the mean of its divisors is an integer number (786599748).

Almost surely, 2^8903910021 is an apocalyptic number.

It is an amenable number.

8903910021 is a deficient number, since it is larger than the sum of its proper divisors (3681685947).

8903910021 is a wasteful number, since it uses less digits than its factorization.

8903910021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213492.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 8903910021 is about 94360.5321148625. The cubic root of 8903910021 is about 2072.6545343883.

The spelling of 8903910021 in words is "eight billion, nine hundred three million, nine hundred ten thousand, twenty-one".