21133910189 has 16 divisors (see below), whose sum is σ = 24224017920. Its totient is φ = 18061626240.

The previous prime is 21133910183. The next prime is 21133910191. The reversal of 21133910189 is 98101933112.

It is not a de Polignac number, because 21133910189 - 2²⁰ = 21132861613 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 (21133910183) 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, 4273052 + ... + 4277994.

It is an arithmetic number, because the mean of its divisors is an integer number (1514001120).

Almost surely, 2^21133910189 is an apocalyptic number.

It is an amenable number.

21133910189 is a deficient number, since it is larger than the sum of its proper divisors (3090107731).

21133910189 is a wasteful number, since it uses less digits than its factorization.

21133910189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 21133910189 in words is "twenty-one billion, one hundred thirty-three million, nine hundred ten thousand, one hundred eighty-nine".