21313020007 has 2 divisors, whose sum is σ = 21313020008. Its totient is φ = 21313020006.

The previous prime is 21313019999. The next prime is 21313020013. The reversal of 21313020007 is 70002031312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313020007 - 2³ = 21313019999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313020097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656510003 + 10656510004.

It is an arithmetic number, because the mean of its divisors is an integer number (10656510004).

Almost surely, 2^21313020007 is an apocalyptic number.

21313020007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313020007 is an equidigital number, since it uses as much as digits as its factorization.

21313020007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

Adding to 21313020007 its reverse (70002031312), we get a palindrome (91315051319).

The spelling of 21313020007 in words is "twenty-one billion, three hundred thirteen million, twenty thousand, seven".