21767608742963 has 2 divisors, whose sum is σ = 21767608742964. Its totient is φ = 21767608742962.

The previous prime is 21767608742881. The next prime is 21767608742981. The reversal of 21767608742963 is 36924780676712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21767608742963 - 2²⁰ = 21767607694387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21767608742893 and 21767608742902.

It is not a weakly prime, because it can be changed into another prime (21767608742993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10883804371481 + 10883804371482.

It is an arithmetic number, because the mean of its divisors is an integer number (10883804371482).

Almost surely, 2^{21767608742963} is an apocalyptic number.

21767608742963 is a deficient number, since it is larger than the sum of its proper divisors (1).

21767608742963 is an equidigital number, since it uses as much as digits as its factorization.

21767608742963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256048128, while the sum is 68.

The spelling of 21767608742963 in words is "twenty-one trillion, seven hundred sixty-seven billion, six hundred eight million, seven hundred forty-two thousand, nine hundred sixty-three".