20333475181 has 2 divisors, whose sum is σ = 20333475182. Its totient is φ = 20333475180.

The previous prime is 20333475167. The next prime is 20333475187. The reversal of 20333475181 is 18157433302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19984345956 + 349129225 = 141366^2 + 18685^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333475181 - 2⁹ = 20333474669 is a prime.

It is a super-2 number, since 2×20333475181² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20333475181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20333475187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166737590 + 10166737591.

It is an arithmetic number, because the mean of its divisors is an integer number (10166737591).

Almost surely, 2^20333475181 is an apocalyptic number.

It is an amenable number.

20333475181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333475181 is an equidigital number, since it uses as much as digits as its factorization.

20333475181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 20333475181 in words is "twenty billion, three hundred thirty-three million, four hundred seventy-five thousand, one hundred eighty-one".