21246188707 has 2 divisors, whose sum is σ = 21246188708. Its totient is φ = 21246188706.

The previous prime is 21246188701. The next prime is 21246188783. The reversal of 21246188707 is 70788164212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21246188707 is a prime.

It is not a weakly prime, because it can be changed into another prime (21246188701) 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, 10623094353 + 10623094354.

It is an arithmetic number, because the mean of its divisors is an integer number (10623094354).

Almost surely, 2^21246188707 is an apocalyptic number.

21246188707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246188707 is an equidigital number, since it uses as much as digits as its factorization.

21246188707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 21246188707 in words is "twenty-one billion, two hundred forty-six million, one hundred eighty-eight thousand, seven hundred seven".