21452577309767 has 2 divisors, whose sum is σ = 21452577309768. Its totient is φ = 21452577309766.

The previous prime is 21452577309749. The next prime is 21452577309781. The reversal of 21452577309767 is 76790377525412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21452577309767 - 2³² = 21448282342471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21452577309367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726288654883 + 10726288654884.

It is an arithmetic number, because the mean of its divisors is an integer number (10726288654884).

Almost surely, 2^{21452577309767} is an apocalyptic number.

21452577309767 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452577309767 is an equidigital number, since it uses as much as digits as its factorization.

21452577309767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155584800, while the sum is 65.

The spelling of 21452577309767 in words is "twenty-one trillion, four hundred fifty-two billion, five hundred seventy-seven million, three hundred nine thousand, seven hundred sixty-seven".