21011193 has 24 divisors (see below), whose sum is σ = 34819200. Its totient is φ = 11960064.

The previous prime is 21011191. The next prime is 21011231. The reversal of 21011193 is 39111012.

It is not a de Polignac number, because 21011193 - 2¹ = 21011191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22153 + ... + 23081.

It is an arithmetic number, because the mean of its divisors is an integer number (1450800).

Almost surely, 2^21011193 is an apocalyptic number.

It is an amenable number.

21011193 is a deficient number, since it is larger than the sum of its proper divisors (13808007).

21011193 is a wasteful number, since it uses less digits than its factorization.

21011193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 21011193 is about 4583.7967886895. The cubic root of 21011193 is about 275.9414258182.

The spelling of 21011193 in words is "twenty-one million, eleven thousand, one hundred ninety-three".