20132111 has 4 divisors (see below), whose sum is σ = 20147472. Its totient is φ = 20116752.

The previous prime is 20132081. The next prime is 20132117. The reversal of 20132111 is 11123102.

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

It is a cyclic number.

It is not a de Polignac number, because 20132111 - 2¹⁴ = 20115727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20132092 and 20132101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5510 + ... + 8403.

It is an arithmetic number, because the mean of its divisors is an integer number (5036868).

Almost surely, 2^20132111 is an apocalyptic number.

20132111 is a deficient number, since it is larger than the sum of its proper divisors (15361).

20132111 is a wasteful number, since it uses less digits than its factorization.

20132111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15360.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 20132111 is about 4486.8821023067. The cubic root of 20132111 is about 272.0381245220.

Adding to 20132111 its reverse (11123102), we get a palindrome (31255213).

Subtracting from 20132111 its reverse (11123102), we obtain a palindrome (9009009).

The spelling of 20132111 in words is "twenty million, one hundred thirty-two thousand, one hundred eleven".