20911101 has 8 divisors (see below), whose sum is σ = 27912864. Its totient is φ = 13925040.

The previous prime is 20911087. The next prime is 20911123. The reversal of 20911101 is 10111902.

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

It is not a de Polignac number, because 20911101 - 2¹⁹ = 20386813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20911171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351 + ... + 6476.

It is an arithmetic number, because the mean of its divisors is an integer number (3489108).

Almost surely, 2^20911101 is an apocalyptic number.

It is an amenable number.

20911101 is a deficient number, since it is larger than the sum of its proper divisors (7001763).

20911101 is a wasteful number, since it uses less digits than its factorization.

20911101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 20911101 is about 4572.8657316829. The cubic root of 20911101 is about 275.5025565116.

It can be divided in two parts, 20911 and 101, that added together give a palindrome (21012).

The spelling of 20911101 in words is "twenty million, nine hundred eleven thousand, one hundred one".