21488100307 has 2 divisors, whose sum is σ = 21488100308. Its totient is φ = 21488100306.

The previous prime is 21488100259. The next prime is 21488100377. The reversal of 21488100307 is 70300188412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21488100307 - 2²⁷ = 21353882579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21488100377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10744050153 + 10744050154.

It is an arithmetic number, because the mean of its divisors is an integer number (10744050154).

Almost surely, 2^21488100307 is an apocalyptic number.

21488100307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21488100307 is an equidigital number, since it uses as much as digits as its factorization.

21488100307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

Adding to 21488100307 its reverse (70300188412), we get a palindrome (91788288719).

The spelling of 21488100307 in words is "twenty-one billion, four hundred eighty-eight million, one hundred thousand, three hundred seven".