20109695 has 8 divisors (see below), whose sum is σ = 25401840. Its totient is φ = 15240960.

The previous prime is 20109667. The next prime is 20109707. The reversal of 20109695 is 59690102.

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

It is not a de Polignac number, because 20109695 - 2¹² = 20105599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105746 + ... + 105935.

It is an arithmetic number, because the mean of its divisors is an integer number (3175230).

Almost surely, 2^20109695 is an apocalyptic number.

20109695 is a deficient number, since it is larger than the sum of its proper divisors (5292145).

20109695 is a wasteful number, since it uses less digits than its factorization.

20109695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211705.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20109695 is about 4484.3834581802. The cubic root of 20109695 is about 271.9371205212.

Adding to 20109695 its reverse (59690102), we get a palindrome (79799797).

The spelling of 20109695 in words is "twenty million, one hundred nine thousand, six hundred ninety-five".