21653053126267 has 2 divisors, whose sum is σ = 21653053126268. Its totient is φ = 21653053126266.

The previous prime is 21653053126231. The next prime is 21653053126337. The reversal of 21653053126267 is 76262135035612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21653053126267 is a prime.

It is a super-2 number, since 2×21653053126267² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21653053126267.

It is not a weakly prime, because it can be changed into another prime (21653053126217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826526563133 + 10826526563134.

It is an arithmetic number, because the mean of its divisors is an integer number (10826526563134).

Almost surely, 2^{21653053126267} is an apocalyptic number.

21653053126267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21653053126267 is an equidigital number, since it uses as much as digits as its factorization.

21653053126267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 21653053126267 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-three million, one hundred twenty-six thousand, two hundred sixty-seven".