21075326 has 4 divisors (see below), whose sum is σ = 31612992. Its totient is φ = 10537662.

The previous prime is 21075283. The next prime is 21075347. The reversal of 21075326 is 62357012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21075295 and 21075304.

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 as a sum of consecutive naturals, namely, 5268830 + ... + 5268833.

It is an arithmetic number, because the mean of its divisors is an integer number (7903248).

Almost surely, 2^21075326 is an apocalyptic number.

21075326 is a deficient number, since it is larger than the sum of its proper divisors (10537666).

21075326 is a wasteful number, since it uses less digits than its factorization.

21075326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10537665.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 21075326 is about 4590.7870784867. The cubic root of 21075326 is about 276.2218949998.

The spelling of 21075326 in words is "twenty-one million, seventy-five thousand, three hundred twenty-six".