20111164 has 6 divisors (see below), whose sum is σ = 35194544. Its totient is φ = 10055580.

The previous prime is 20111137. The next prime is 20111167. The reversal of 20111164 is 46111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513892 + ... + 2513899.

Almost surely, 2^20111164 is an apocalyptic number.

It is an amenable number.

20111164 is a deficient number, since it is larger than the sum of its proper divisors (15083380).

20111164 is a wasteful number, since it uses less digits than its factorization.

20111164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027795 (or 5027793 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 20111164 is about 4484.5472458209. The cubic root of 20111164 is about 271.9437419693.

Adding to 20111164 its reverse (46111102), we get a palindrome (66222266).

The spelling of 20111164 in words is "twenty million, one hundred eleven thousand, one hundred sixty-four".