20195105 has 24 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 13396320.

The previous prime is 20195089. The next prime is 20195111. The reversal of 20195105 is 50159102.

It is not a de Polignac number, because 20195105 - 2⁴ = 20195089 is a prime.

It is a super-2 number, since 2×20195105² = 815684531922050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6266 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (1212960).

Almost surely, 2^20195105 is an apocalyptic number.

It is an amenable number.

20195105 is a deficient number, since it is larger than the sum of its proper divisors (8915935).

20195105 is a wasteful number, since it uses less digits than its factorization.

20195105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709 (or 2702 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 20195105 is about 4493.8964162517. The cubic root of 20195105 is about 272.3215676707.

The spelling of 20195105 in words is "twenty million, one hundred ninety-five thousand, one hundred five".