33021031993 has 2 divisors, whose sum is σ = 33021031994. Its totient is φ = 33021031992.

The previous prime is 33021031961. The next prime is 33021032027. The reversal of 33021031993 is 39913012033.

It is an a-pointer prime, because the next prime (33021032027) can be obtained adding 33021031993 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19043172009 + 13977859984 = 137997^2 + 118228^2 .

It is a cyclic number.

It is not a de Polignac number, because 33021031993 - 2⁵ = 33021031961 is a prime.

It is not a weakly prime, because it can be changed into another prime (33021031903) 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, 16510515996 + 16510515997.

It is an arithmetic number, because the mean of its divisors is an integer number (16510515997).

Almost surely, 2^33021031993 is an apocalyptic number.

It is an amenable number.

33021031993 is a deficient number, since it is larger than the sum of its proper divisors (1).

33021031993 is an equidigital number, since it uses as much as digits as its factorization.

33021031993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

The spelling of 33021031993 in words is "thirty-three billion, twenty-one million, thirty-one thousand, nine hundred ninety-three".