20112237 has 6 divisors (see below), whose sum is σ = 29051022. Its totient is φ = 13408152.

The previous prime is 20112233. The next prime is 20112251. The reversal of 20112237 is 73221102.

It can be written as a sum of positive squares in only one way, i.e., 18224361 + 1887876 = 4269^2 + 1374^2 .

It is not a de Polignac number, because 20112237 - 2² = 20112233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117338 + ... + 1117355.

It is an arithmetic number, because the mean of its divisors is an integer number (4841837).

Almost surely, 2^20112237 is an apocalyptic number.

It is an amenable number.

20112237 is a deficient number, since it is larger than the sum of its proper divisors (8938785).

20112237 is a wasteful number, since it uses less digits than its factorization.

20112237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234699 (or 2234696 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20112237 is about 4484.6668772608. Note that the first 3 decimals coincide. The cubic root of 20112237 is about 271.9485782623.

Adding to 20112237 its reverse (73221102), we get a palindrome (93333339).

The spelling of 20112237 in words is "twenty million, one hundred twelve thousand, two hundred thirty-seven".