20016131 has 2 divisors, whose sum is σ = 20016132. Its totient is φ = 20016130.

The previous prime is 20016121. The next prime is 20016133. The reversal of 20016131 is 13161002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20016131 - 2⁶ = 20016067 is a prime.

It is a super-2 number, since 2×20016131² = 801291000418322, which contains 22 as substring.

Together with 20016133, 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 (20016133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008065 + 10008066.

It is an arithmetic number, because the mean of its divisors is an integer number (10008066).

Almost surely, 2^20016131 is an apocalyptic number.

20016131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016131 is an equidigital number, since it uses as much as digits as its factorization.

20016131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20016131 is about 4473.9390921201. The cubic root of 20016131 is about 271.5147191660.

Adding to 20016131 its reverse (13161002), we get a palindrome (33177133).

The spelling of 20016131 in words is "twenty million, sixteen thousand, one hundred thirty-one".