21113664033 has 16 divisors (see below), whose sum is σ = 35098039296. Its totient is φ = 10968137040.

The previous prime is 21113664001. The next prime is 21113664037. The reversal of 21113664033 is 33046631112.

It is not a de Polignac number, because 21113664033 - 2⁵ = 21113664001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113664037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45700341 + ... + 45700802.

It is an arithmetic number, because the mean of its divisors is an integer number (2193627456).

Almost surely, 2^21113664033 is an apocalyptic number.

It is an amenable number.

21113664033 is a deficient number, since it is larger than the sum of its proper divisors (13984375263).

21113664033 is a wasteful number, since it uses less digits than its factorization.

21113664033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91401164.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 21113664033 in words is "twenty-one billion, one hundred thirteen million, six hundred sixty-four thousand, thirty-three".