21875703 has 4 divisors (see below), whose sum is σ = 29167608. Its totient is φ = 14583800.

The previous prime is 21875699. The next prime is 21875713. The reversal of 21875703 is 30757812.

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

It is a cyclic number.

It is not a de Polignac number, because 21875703 - 2² = 21875699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21875713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3645948 + ... + 3645953.

It is an arithmetic number, because the mean of its divisors is an integer number (7291902).

Almost surely, 2^21875703 is an apocalyptic number.

21875703 is a deficient number, since it is larger than the sum of its proper divisors (7291905).

21875703 is an equidigital number, since it uses as much as digits as its factorization.

21875703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7291904.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 21875703 is about 4677.1468867249. The cubic root of 21875703 is about 279.6752314438.

It can be divided in two parts, 21875 and 703, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 21875703 in words is "twenty-one million, eight hundred seventy-five thousand, seven hundred three".