21032195 has 4 divisors (see below), whose sum is σ = 25238640. Its totient is φ = 16825752.

The previous prime is 21032161. The next prime is 21032197. The reversal of 21032195 is 59123012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21032195 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21032195.

It is not an unprimeable number, because it can be changed into a prime (21032197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2103215 + ... + 2103224.

It is an arithmetic number, because the mean of its divisors is an integer number (6309660).

Almost surely, 2^21032195 is an apocalyptic number.

21032195 is a deficient number, since it is larger than the sum of its proper divisors (4206445).

21032195 is an equidigital number, since it uses as much as digits as its factorization.

21032195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206444.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 21032195 is about 4586.0871121251. The cubic root of 21032195 is about 276.0333354331.

The spelling of 21032195 in words is "twenty-one million, thirty-two thousand, one hundred ninety-five".