20112401 has 2 divisors, whose sum is σ = 20112402. Its totient is φ = 20112400.

The previous prime is 20112361. The next prime is 20112403. The reversal of 20112401 is 10421102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 5058001 = 3880^2 + 2249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112401 is a prime.

Together with 20112403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20112403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056200 + 10056201.

It is an arithmetic number, because the mean of its divisors is an integer number (10056201).

Almost surely, 2^20112401 is an apocalyptic number.

It is an amenable number.

20112401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112401 is an equidigital number, since it uses as much as digits as its factorization.

20112401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20112401 is about 4484.6851617477. The cubic root of 20112401 is about 271.9493174382.

Adding to 20112401 its reverse (10421102), we get a palindrome (30533503).

The spelling of 20112401 in words is "twenty million, one hundred twelve thousand, four hundred one".