21132193 has 8 divisors (see below), whose sum is σ = 22097088. Its totient is φ = 20171184.

The previous prime is 21132191. The next prime is 21132197. The reversal of 21132193 is 39123112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21132193 - 2¹ = 21132191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20355 + ... + 21367.

It is an arithmetic number, because the mean of its divisors is an integer number (2762136).

Almost surely, 2^21132193 is an apocalyptic number.

21132193 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21132193 is a deficient number, since it is larger than the sum of its proper divisors (964895).

21132193 is a wasteful number, since it uses less digits than its factorization.

21132193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its digits is 324, while the sum is 22.

The square root of 21132193 is about 4596.9765063572. The cubic root of 21132193 is about 276.4701126480.

The spelling of 21132193 in words is "twenty-one million, one hundred thirty-two thousand, one hundred ninety-three".