21653053126263 has 12 divisors (see below), whose sum is σ = 33682527085480. Its totient is φ = 13324955769936.

The previous prime is 21653053126231. The next prime is 21653053126267. The reversal of 21653053126263 is 36262135035612.

21653053126263 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 3 + 0 + 5 + 3 + 12 + 626 + 3 = 666.

It is not a de Polignac number, because 21653053126263 - 2⁵ = 21653053126231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21653053126267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92534414953 + ... + 92534415186.

Almost surely, 2^{21653053126263} is an apocalyptic number.

21653053126263 is a deficient number, since it is larger than the sum of its proper divisors (12029473959217).

21653053126263 is a wasteful number, since it uses less digits than its factorization.

21653053126263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185068830158 (or 185068830155 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 21653053126263 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-three million, one hundred twenty-six thousand, two hundred sixty-three".