21267662707 has 2 divisors, whose sum is σ = 21267662708. Its totient is φ = 21267662706.

The previous prime is 21267662651. The next prime is 21267662729. The reversal of 21267662707 is 70726676212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21267662707 - 2⁷ = 21267662579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21267662777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10633831353 + 10633831354.

It is an arithmetic number, because the mean of its divisors is an integer number (10633831354).

Almost surely, 2^21267662707 is an apocalyptic number.

21267662707 is a deficient number, since it is larger than the sum of its proper divisors (1).

21267662707 is an equidigital number, since it uses as much as digits as its factorization.

21267662707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 21267662707 in words is "twenty-one billion, two hundred sixty-seven million, six hundred sixty-two thousand, seven hundred seven".