10089171821 has 4 divisors (see below), whose sum is σ = 10210728192. Its totient is φ = 9967615452.

The previous prime is 10089171791. The next prime is 10089171823. The reversal of 10089171821 is 12817198001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10089171821 - 2²⁶ = 10022062957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10089171823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60778061 + ... + 60778226.

It is an arithmetic number, because the mean of its divisors is an integer number (2552682048).

Almost surely, 2^10089171821 is an apocalyptic number.

It is an amenable number.

10089171821 is a deficient number, since it is larger than the sum of its proper divisors (121556371).

10089171821 is an equidigital number, since it uses as much as digits as its factorization.

10089171821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121556370.

The product of its (nonzero) digits is 8064, while the sum is 38.

The spelling of 10089171821 in words is "ten billion, eighty-nine million, one hundred seventy-one thousand, eight hundred twenty-one".