33980034821 has 2 divisors, whose sum is σ = 33980034822. Its totient is φ = 33980034820.

The previous prime is 33980034799. The next prime is 33980034827. The reversal of 33980034821 is 12843008933.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32648514721 + 1331520100 = 180689^2 + 36490^2 .

It is a cyclic number.

It is not a de Polignac number, because 33980034821 - 2⁶ = 33980034757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33980034827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16990017410 + 16990017411.

It is an arithmetic number, because the mean of its divisors is an integer number (16990017411).

Almost surely, 2^33980034821 is an apocalyptic number.

It is an amenable number.

33980034821 is a deficient number, since it is larger than the sum of its proper divisors (1).

33980034821 is an equidigital number, since it uses as much as digits as its factorization.

33980034821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 33980034821 in words is "thirty-three billion, nine hundred eighty million, thirty-four thousand, eight hundred twenty-one".