33000718921 has 9 divisors (see below), whose sum is σ = 33580439661. Its totient is φ = 32430848364.

The previous prime is 33000718871. The next prime is 33000718963. The reversal of 33000718921 is 12981700033.

The square root of 33000718921 is 181661.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 33000718921 - 2⁹ = 33000718409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33000718981) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10716460 + ... + 10719538.

Almost surely, 2^33000718921 is an apocalyptic number.

33000718921 is the 181661-st square number.

33000718921 is the 90831-st centered octagonal number.

It is an amenable number.

33000718921 is a deficient number, since it is larger than the sum of its proper divisors (579720740).

33000718921 is an frugal number, since it uses more digits than its factorization.

33000718921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276 (or 3138 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 33000718921 in words is "thirty-three billion, seven hundred eighteen thousand, nine hundred twenty-one".