20112031 has 2 divisors, whose sum is σ = 20112032. Its totient is φ = 20112030.

The previous prime is 20112023. The next prime is 20112061. The reversal of 20112031 is 13021102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20112031 - 2³ = 20112023 is a prime.

It is a super-2 number, since 2×20112031² = 808987581889922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20111999 and 20112017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056015 + 10056016.

It is an arithmetic number, because the mean of its divisors is an integer number (10056016).

Almost surely, 2^20112031 is an apocalyptic number.

20112031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112031 is an equidigital number, since it uses as much as digits as its factorization.

20112031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20112031 is about 4484.6439100557. The cubic root of 20112031 is about 271.9476497795.

Adding to 20112031 its reverse (13021102), we get a palindrome (33133133).

The spelling of 20112031 in words is "twenty million, one hundred twelve thousand, thirty-one".