21095422 has 4 divisors (see below), whose sum is σ = 31643136. Its totient is φ = 10547710.

The previous prime is 21095401. The next prime is 21095423. The reversal of 21095422 is 22459012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21095423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5273854 + ... + 5273857.

It is an arithmetic number, because the mean of its divisors is an integer number (7910784).

Almost surely, 2^21095422 is an apocalyptic number.

21095422 is a deficient number, since it is larger than the sum of its proper divisors (10547714).

21095422 is a wasteful number, since it uses less digits than its factorization.

21095422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547713.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 21095422 is about 4592.9752884160. The cubic root of 21095422 is about 276.3096625911.

It can be divided in two parts, 21095 and 422, that multiplied together give a triangular number (8902090 = T₄₂₁₉).

The spelling of 21095422 in words is "twenty-one million, ninety-five thousand, four hundred twenty-two".