21195084 has 24 divisors (see below), whose sum is σ = 49534128. Its totient is φ = 7053760.

The previous prime is 21195077. The next prime is 21195091. The reversal of 21195084 is 48059112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21195077) and next prime (21195091).

It is an unprimeable number.

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, 10354 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (2063922).

Almost surely, 2^21195084 is an apocalyptic number.

It is an amenable number.

21195084 is an abundant number, since it is smaller than the sum of its proper divisors (28339044).

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

21195084 is a wasteful number, since it uses less digits than its factorization.

21195084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 21195084 is about 4603.8118988508. The cubic root of 21195084 is about 276.7441063204.

The spelling of 21195084 in words is "twenty-one million, one hundred ninety-five thousand, eighty-four".