21369084 has 36 divisors (see below), whose sum is σ = 54809832. Its totient is φ = 6475040.

The previous prime is 21369059. The next prime is 21369109. The reversal of 21369084 is 48096312.

It is an interprime number because it is at equal distance from previous prime (21369059) and next prime (21369109).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 5907 + ... + 8810.

Almost surely, 2^21369084 is an apocalyptic number.

It is an amenable number.

21369084 is an abundant number, since it is smaller than the sum of its proper divisors (33440748).

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

21369084 is a wasteful number, since it uses less digits than its factorization.

21369084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14746 (or 14733 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 21369084 is about 4622.6706566659. The cubic root of 21369084 is about 277.4993490773.

The spelling of 21369084 in words is "twenty-one million, three hundred sixty-nine thousand, eighty-four".