20911106 has 4 divisors (see below), whose sum is σ = 31366662. Its totient is φ = 10455552.

The previous prime is 20911087. The next prime is 20911123. The reversal of 20911106 is 60111902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 885481 = 4475^2 + 941^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5227775 + ... + 5227778.

Almost surely, 2^20911106 is an apocalyptic number.

20911106 is a deficient number, since it is larger than the sum of its proper divisors (10455556).

20911106 is a wasteful number, since it uses less digits than its factorization.

20911106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10455555.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 20911106 is about 4572.8662783860. The cubic root of 20911106 is about 275.5025784698.

The spelling of 20911106 in words is "twenty million, nine hundred eleven thousand, one hundred six".