21650195 has 8 divisors (see below), whose sum is σ = 29691744. Its totient is φ = 14845824.

The previous prime is 21650191. The next prime is 21650201. The reversal of 21650195 is 59105612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21650195 - 2² = 21650191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21650191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309254 + ... + 309323.

It is an arithmetic number, because the mean of its divisors is an integer number (3711468).

Almost surely, 2^21650195 is an apocalyptic number.

21650195 is a deficient number, since it is larger than the sum of its proper divisors (8041549).

21650195 is an equidigital number, since it uses as much as digits as its factorization.

21650195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618589.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 21650195 is about 4652.9770040266. The cubic root of 21650195 is about 278.7108895640.

The spelling of 21650195 in words is "twenty-one million, six hundred fifty thousand, one hundred ninety-five".