21313653629867 has 2 divisors, whose sum is σ = 21313653629868. Its totient is φ = 21313653629866.

The previous prime is 21313653629857. The next prime is 21313653629899. The reversal of 21313653629867 is 76892635631312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313653629867 - 2¹⁶ = 21313653564331 is a prime.

It is not a weakly prime, because it can be changed into another prime (21313653629857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656826814933 + 10656826814934.

It is an arithmetic number, because the mean of its divisors is an integer number (10656826814934).

Almost surely, 2^{21313653629867} is an apocalyptic number.

21313653629867 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313653629867 is an equidigital number, since it uses as much as digits as its factorization.

21313653629867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 62.

The spelling of 21313653629867 in words is "twenty-one trillion, three hundred thirteen billion, six hundred fifty-three million, six hundred twenty-nine thousand, eight hundred sixty-seven".