21410755 has 4 divisors (see below), whose sum is σ = 25692912. Its totient is φ = 17128600.

The previous prime is 21410749. The next prime is 21410773. The reversal of 21410755 is 55701412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21410755 - 2³ = 21410747 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2141071 + ... + 2141080.

It is an arithmetic number, because the mean of its divisors is an integer number (6423228).

Almost surely, 2^21410755 is an apocalyptic number.

21410755 is a deficient number, since it is larger than the sum of its proper divisors (4282157).

21410755 is an equidigital number, since it uses as much as digits as its factorization.

21410755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282156.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 21410755 is about 4627.1757044660. The cubic root of 21410755 is about 277.6796120979.

The spelling of 21410755 in words is "twenty-one million, four hundred ten thousand, seven hundred fifty-five".