21444633066633 has 16 divisors (see below), whose sum is σ = 32678598700416. Its totient is φ = 12253677563520.

The previous prime is 21444633066611. The next prime is 21444633066641. The reversal of 21444633066633 is 33666033644412.

It is not a de Polignac number, because 21444633066633 - 2¹⁸ = 21444632804489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444633066643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15941316 + ... + 17234117.

It is an arithmetic number, because the mean of its divisors is an integer number (2042412418776).

Almost surely, 2^{21444633066633} is an apocalyptic number.

It is an amenable number.

21444633066633 is a deficient number, since it is larger than the sum of its proper divisors (11233965633783).

21444633066633 is a wasteful number, since it uses less digits than its factorization.

21444633066633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33206224.

The product of its (nonzero) digits is 13436928, while the sum is 51.

The spelling of 21444633066633 in words is "twenty-one trillion, four hundred forty-four billion, six hundred thirty-three million, sixty-six thousand, six hundred thirty-three".