33433000021 has 2 divisors, whose sum is σ = 33433000022. Its totient is φ = 33433000020.

The previous prime is 33433000019. The next prime is 33433000057. The reversal of 33433000021 is 12000033433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33317200900 + 115799121 = 182530^2 + 10761^2 .

It is a cyclic number.

It is not a de Polignac number, because 33433000021 - 2¹ = 33433000019 is a prime.

It is a super-2 number, since 2×33433000021² (a number of 22 digits) contains 22 as substring.

Together with 33433000019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33433004021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16716500010 + 16716500011.

It is an arithmetic number, because the mean of its divisors is an integer number (16716500011).

Almost surely, 2^33433000021 is an apocalyptic number.

It is an amenable number.

33433000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33433000021 is an equidigital number, since it uses as much as digits as its factorization.

33433000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 33433000021 its reverse (12000033433), we get a palindrome (45433033454).

The spelling of 33433000021 in words is "thirty-three billion, four hundred thirty-three million, twenty-one", and thus it is an aban number.