33020564021 has 2 divisors, whose sum is σ = 33020564022. Its totient is φ = 33020564020.

The previous prime is 33020564011. The next prime is 33020564039. The reversal of 33020564021 is 12046502033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20635322500 + 12385241521 = 143650^2 + 111289^2 .

It is a cyclic number.

It is not a de Polignac number, because 33020564021 - 2⁶ = 33020563957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33020564011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510282010 + 16510282011.

It is an arithmetic number, because the mean of its divisors is an integer number (16510282011).

Almost surely, 2^33020564021 is an apocalyptic number.

It is an amenable number.

33020564021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33020564021 is an equidigital number, since it uses as much as digits as its factorization.

33020564021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The spelling of 33020564021 in words is "thirty-three billion, twenty million, five hundred sixty-four thousand, twenty-one".