20218206031 has 2 divisors, whose sum is σ = 20218206032. Its totient is φ = 20218206030.

The previous prime is 20218205951. The next prime is 20218206083. The reversal of 20218206031 is 13060281202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20218206031 - 2¹¹ = 20218203983 is a prime.

It is a super-2 number, since 2×20218206031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20218205987 and 20218206005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20218206091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109103015 + 10109103016.

It is an arithmetic number, because the mean of its divisors is an integer number (10109103016).

Almost surely, 2^20218206031 is an apocalyptic number.

20218206031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20218206031 is an equidigital number, since it uses as much as digits as its factorization.

20218206031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 20218206031 its reverse (13060281202), we get a palindrome (33278487233).

The spelling of 20218206031 in words is "twenty billion, two hundred eighteen million, two hundred six thousand, thirty-one".