10189534921 has 2 divisors, whose sum is σ = 10189534922. Its totient is φ = 10189534920.

The previous prime is 10189534897. The next prime is 10189534933. The reversal of 10189534921 is 12943598101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8694630025 + 1494904896 = 93245^2 + 38664^2 .

It is a cyclic number.

It is not a de Polignac number, because 10189534921 - 2⁷ = 10189534793 is a prime.

It is not a weakly prime, because it can be changed into another prime (10189534961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5094767460 + 5094767461.

It is an arithmetic number, because the mean of its divisors is an integer number (5094767461).

Almost surely, 2^10189534921 is an apocalyptic number.

It is an amenable number.

10189534921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10189534921 is an equidigital number, since it uses as much as digits as its factorization.

10189534921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 10189534921 in words is "ten billion, one hundred eighty-nine million, five hundred thirty-four thousand, nine hundred twenty-one".