21088195 has 16 divisors (see below), whose sum is σ = 27210240. Its totient is φ = 15639264.

The previous prime is 21088159. The next prime is 21088201. The reversal of 21088195 is 59188012.

It is a cyclic number.

It is not a de Polignac number, because 21088195 - 2⁹ = 21087683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21088195.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2104 + ... + 6826.

It is an arithmetic number, because the mean of its divisors is an integer number (1700640).

Almost surely, 2^21088195 is an apocalyptic number.

21088195 is a deficient number, since it is larger than the sum of its proper divisors (6122045).

21088195 is a wasteful number, since it uses less digits than its factorization.

21088195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 21088195 is about 4592.1884760972. The cubic root of 21088195 is about 276.2781056968.

The spelling of 21088195 in words is "twenty-one million, eighty-eight thousand, one hundred ninety-five".