21133194 has 8 divisors (see below), whose sum is σ = 42266400. Its totient is φ = 7044396.

The previous prime is 21133153. The next prime is 21133213. The reversal of 21133194 is 49133112.

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

21133194 is an admirable number.

It is a super-2 number, since 2×21133194² = 893223777283272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761094 + ... + 1761105.

It is an arithmetic number, because the mean of its divisors is an integer number (5283300).

Almost surely, 2^21133194 is an apocalyptic number.

21133194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133194 is a wasteful number, since it uses less digits than its factorization.

21133194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522204.

The product of its digits is 648, while the sum is 24.

The square root of 21133194 is about 4597.0853809778. The cubic root of 21133194 is about 276.4744779027.

The spelling of 21133194 in words is "twenty-one million, one hundred thirty-three thousand, one hundred ninety-four".