21182088 has 16 divisors (see below), whose sum is σ = 52955280. Its totient is φ = 7060688.

The previous prime is 21182009. The next prime is 21182107. The reversal of 21182088 is 88028112.

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, 441270 + ... + 441317.

It is an arithmetic number, because the mean of its divisors is an integer number (3309705).

Almost surely, 2^21182088 is an apocalyptic number.

It is an amenable number.

21182088 is an abundant number, since it is smaller than the sum of its proper divisors (31773192).

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

21182088 is a wasteful number, since it uses less digits than its factorization.

21182088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882596 (or 882592 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 21182088 is about 4602.4002433513. The cubic root of 21182088 is about 276.6875318533.

The spelling of 21182088 in words is "twenty-one million, one hundred eighty-two thousand, eighty-eight".