21095146 has 4 divisors (see below), whose sum is σ = 31642722. Its totient is φ = 10547572.

The previous prime is 21095141. The next prime is 21095161. The reversal of 21095146 is 64159012.

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

It can be written as a sum of positive squares in only one way, i.e., 15689521 + 5405625 = 3961^2 + 2325^2 .

It is a super-2 number, since 2×21095146² = 890010369522632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21095141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5273785 + ... + 5273788.

Almost surely, 2^21095146 is an apocalyptic number.

21095146 is a deficient number, since it is larger than the sum of its proper divisors (10547576).

21095146 is a wasteful number, since it uses less digits than its factorization.

21095146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10547575.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 21095146 is about 4592.9452424343. The cubic root of 21095146 is about 276.3084575619.

The spelling of 21095146 in words is "twenty-one million, ninety-five thousand, one hundred forty-six".