21384110 has 32 divisors (see below), whose sum is σ = 43352064. Its totient is φ = 7524000.

The previous prime is 21384073. The next prime is 21384151. The reversal of 21384110 is 1148312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (1354752).

Almost surely, 2^21384110 is an apocalyptic number.

21384110 is an abundant number, since it is smaller than the sum of its proper divisors (21967954).

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

21384110 is a wasteful number, since it uses less digits than its factorization.

21384110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 21384110 is about 4624.2956220380. The cubic root of 21384110 is about 277.5643764828.

The spelling of 21384110 in words is "twenty-one million, three hundred eighty-four thousand, one hundred ten".