33149964821 has 2 divisors, whose sum is σ = 33149964822. Its totient is φ = 33149964820.

The previous prime is 33149964817. The next prime is 33149964833. The reversal of 33149964821 is 12846994133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32837064100 + 312900721 = 181210^2 + 17689^2 .

It is a cyclic number.

It is not a de Polignac number, because 33149964821 - 2² = 33149964817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33149964821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33149964851) 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, 16574982410 + 16574982411.

It is an arithmetic number, because the mean of its divisors is an integer number (16574982411).

Almost surely, 2^33149964821 is an apocalyptic number.

It is an amenable number.

33149964821 is a deficient number, since it is larger than the sum of its proper divisors (1).

33149964821 is an equidigital number, since it uses as much as digits as its factorization.

33149964821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The spelling of 33149964821 in words is "thirty-three billion, one hundred forty-nine million, nine hundred sixty-four thousand, eight hundred twenty-one".