21492095 has 4 divisors (see below), whose sum is σ = 25790520. Its totient is φ = 17193672.

The previous prime is 21492067. The next prime is 21492151. The reversal of 21492095 is 59029412.

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 21492095 - 2⁸ = 21491839 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 2149205 + ... + 2149214.

It is an arithmetic number, because the mean of its divisors is an integer number (6447630).

Almost surely, 2^21492095 is an apocalyptic number.

21492095 is a deficient number, since it is larger than the sum of its proper divisors (4298425).

21492095 is an equidigital number, since it uses as much as digits as its factorization.

21492095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298424.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 21492095 is about 4635.9567513082. The cubic root of 21492095 is about 278.0308050332.

The spelling of 21492095 in words is "twenty-one million, four hundred ninety-two thousand, ninety-five".