20066131 has 2 divisors, whose sum is σ = 20066132. Its totient is φ = 20066130.

The previous prime is 20066129. The next prime is 20066141. The reversal of 20066131 is 13166002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20066131 - 2¹ = 20066129 is a prime.

It is a super-2 number, since 2×20066131² = 805299226618322, which contains 22 as substring.

Together with 20066129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20066099 and 20066108.

It is not a weakly prime, because it can be changed into another prime (20066141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033065 + 10033066.

It is an arithmetic number, because the mean of its divisors is an integer number (10033066).

Almost surely, 2^20066131 is an apocalyptic number.

20066131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066131 is an equidigital number, since it uses as much as digits as its factorization.

20066131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20066131 is about 4479.5235237690. The cubic root of 20066131 is about 271.7406110999.

The spelling of 20066131 in words is "twenty million, sixty-six thousand, one hundred thirty-one".