21777058267 has 2 divisors, whose sum is σ = 21777058268. Its totient is φ = 21777058266.

The previous prime is 21777058243. The next prime is 21777058319. The reversal of 21777058267 is 76285077712.

It is an a-pointer prime, because the next prime (21777058319) can be obtained adding 21777058267 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21777058267 is a prime.

It is not a weakly prime, because it can be changed into another prime (21777053267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10888529133 + 10888529134.

It is an arithmetic number, because the mean of its divisors is an integer number (10888529134).

Almost surely, 2^21777058267 is an apocalyptic number.

21777058267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21777058267 is an equidigital number, since it uses as much as digits as its factorization.

21777058267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304960, while the sum is 52.

The spelling of 21777058267 in words is "twenty-one billion, seven hundred seventy-seven million, fifty-eight thousand, two hundred sixty-seven".