20116905 has 16 divisors (see below), whose sum is σ = 32936640. Its totient is φ = 10479168.

The previous prime is 20116903. The next prime is 20116907. The reversal of 20116905 is 50961102.

It is an interprime number because it is at equal distance from previous prime (20116903) and next prime (20116907).

It is not a de Polignac number, because 20116905 - 2¹ = 20116903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20116903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14950 + ... + 16239.

It is an arithmetic number, because the mean of its divisors is an integer number (2058540).

Almost surely, 2^20116905 is an apocalyptic number.

It is an amenable number.

20116905 is a deficient number, since it is larger than the sum of its proper divisors (12819735).

20116905 is a wasteful number, since it uses less digits than its factorization.

20116905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31240.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 20116905 is about 4485.1872870595. The cubic root of 20116905 is about 271.9696161635.

The spelling of 20116905 in words is "twenty million, one hundred sixteen thousand, nine hundred five".