21163534044233 has 32 divisors (see below), whose sum is σ = 25193295621120. Its totient is φ = 17401387671360.

The previous prime is 21163534044223. The next prime is 21163534044329. The reversal of 21163534044233 is 33244043536112.

It is not a de Polignac number, because 21163534044233 - 2¹⁸ = 21163533782089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21163534044223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11225366 + ... + 12974432.

It is an arithmetic number, because the mean of its divisors is an integer number (787290488160).

Almost surely, 2^{21163534044233} is an apocalyptic number.

It is an amenable number.

21163534044233 is a deficient number, since it is larger than the sum of its proper divisors (4029761576887).

21163534044233 is a wasteful number, since it uses less digits than its factorization.

21163534044233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749837.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 21163534044233 in words is "twenty-one trillion, one hundred sixty-three billion, five hundred thirty-four million, forty-four thousand, two hundred thirty-three".