21313653629899 has 2 divisors, whose sum is σ = 21313653629900. Its totient is φ = 21313653629898.

The previous prime is 21313653629867. The next prime is 21313653629911. The reversal of 21313653629899 is 99892635631312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313653629899 - 2⁵ = 21313653629867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21313653629809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656826814949 + 10656826814950.

It is an arithmetic number, because the mean of its divisors is an integer number (10656826814950).

Almost surely, 2^{21313653629899} is an apocalyptic number.

21313653629899 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313653629899 is an equidigital number, since it uses as much as digits as its factorization.

21313653629899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113374080, while the sum is 67.

The spelling of 21313653629899 in words is "twenty-one trillion, three hundred thirteen billion, six hundred fifty-three million, six hundred twenty-nine thousand, eight hundred ninety-nine".