21467263772429 has 2 divisors, whose sum is σ = 21467263772430. Its totient is φ = 21467263772428.

The previous prime is 21467263772393. The next prime is 21467263772441. The reversal of 21467263772429 is 92427736276412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19499051187529 + 1968212584900 = 4415773^2 + 1402930^2 .

It is a cyclic number.

It is not a de Polignac number, because 21467263772429 - 2³² = 21462968805133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21467263772329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733631886214 + 10733631886215.

It is an arithmetic number, because the mean of its divisors is an integer number (10733631886215).

Almost surely, 2^{21467263772429} is an apocalyptic number.

It is an amenable number.

21467263772429 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467263772429 is an equidigital number, since it uses as much as digits as its factorization.

21467263772429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85349376, while the sum is 62.

The spelling of 21467263772429 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred sixty-three million, seven hundred seventy-two thousand, four hundred twenty-nine".