21132695 has 12 divisors (see below), whose sum is σ = 25662936. Its totient is φ = 16705920.

The previous prime is 21132691. The next prime is 21132719. The reversal of 21132695 is 59623112.

It is not a de Polignac number, because 21132695 - 2² = 21132691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132691) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 63680 + ... + 64010.

It is an arithmetic number, because the mean of its divisors is an integer number (2138578).

Almost surely, 2^21132695 is an apocalyptic number.

21132695 is a deficient number, since it is larger than the sum of its proper divisors (4530241).

21132695 is an equidigital number, since it uses as much as digits as its factorization.

21132695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 449 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 21132695 is about 4597.0311071386. The cubic root of 21132695 is about 276.4723018339.

The spelling of 21132695 in words is "twenty-one million, one hundred thirty-two thousand, six hundred ninety-five".