20333313233381 has 2 divisors, whose sum is σ = 20333313233382. Its totient is φ = 20333313233380.

The previous prime is 20333313233377. The next prime is 20333313233479. The reversal of 20333313233381 is 18333231333302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10793918868100 + 9539394365281 = 3285410^2 + 3088591^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333313233381 - 2² = 20333313233377 is a prime.

It is a super-2 number, since 2×20333313233381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20333313233371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166656616690 + 10166656616691.

It is an arithmetic number, because the mean of its divisors is an integer number (10166656616691).

Almost surely, 2^{20333313233381} is an apocalyptic number.

It is an amenable number.

20333313233381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333313233381 is an equidigital number, since it uses as much as digits as its factorization.

20333313233381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 38.

Adding to 20333313233381 its reverse (18333231333302), we get a palindrome (38666544566683).

The spelling of 20333313233381 in words is "twenty trillion, three hundred thirty-three billion, three hundred thirteen million, two hundred thirty-three thousand, three hundred eighty-one".