21194088 has 16 divisors (see below), whose sum is σ = 52985280. Its totient is φ = 7064688.

The previous prime is 21194083. The next prime is 21194093. The reversal of 21194088 is 88049112.

It is an interprime number because it is at equal distance from previous prime (21194083) and next prime (21194093).

It is not an unprimeable number, because it can be changed into a prime (21194083) 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 3 ways as a sum of consecutive naturals, for example, 441520 + ... + 441567.

It is an arithmetic number, because the mean of its divisors is an integer number (3311580).

Almost surely, 2^21194088 is an apocalyptic number.

It is an amenable number.

21194088 is an abundant number, since it is smaller than the sum of its proper divisors (31791192).

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

21194088 is a wasteful number, since it uses less digits than its factorization.

21194088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883096 (or 883092 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 21194088 is about 4603.7037263490. The cubic root of 21194088 is about 276.7397713301.

The spelling of 21194088 in words is "twenty-one million, one hundred ninety-four thousand, eighty-eight".