21230195 has 32 divisors (see below), whose sum is σ = 31850496. Its totient is φ = 13248000.

The previous prime is 21230179. The next prime is 21230203. The reversal of 21230195 is 59103212.

It is not a de Polignac number, because 21230195 - 2⁴ = 21230179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21230195.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17870 + ... + 19020.

It is an arithmetic number, because the mean of its divisors is an integer number (995328).

Almost surely, 2^21230195 is an apocalyptic number.

21230195 is a deficient number, since it is larger than the sum of its proper divisors (10620301).

21230195 is a wasteful number, since it uses less digits than its factorization.

21230195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

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

The square root of 21230195 is about 4607.6235740347. The cubic root of 21230195 is about 276.8968367330.

The spelling of 21230195 in words is "twenty-one million, two hundred thirty thousand, one hundred ninety-five".