20120911 has 8 divisors (see below), whose sum is σ = 21654864. Its totient is φ = 18625920.

The previous prime is 20120899. The next prime is 20120923. The reversal of 20120911 is 11902102.

It is an interprime number because it is at equal distance from previous prime (20120899) and next prime (20120923).

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

It is a cyclic number.

It is not a de Polignac number, because 20120911 - 2⁷ = 20120783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8665 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (2706858).

Almost surely, 2^20120911 is an apocalyptic number.

20120911 is a deficient number, since it is larger than the sum of its proper divisors (1533953).

20120911 is a wasteful number, since it uses less digits than its factorization.

20120911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19481.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 20120911 is about 4485.6338459576. The cubic root of 20120911 is about 271.9876679458.

It can be divided in two parts, 201 and 20911, that added together give a palindrome (21112).

The spelling of 20120911 in words is "twenty million, one hundred twenty thousand, nine hundred eleven".