21141904907 has 2 divisors, whose sum is σ = 21141904908. Its totient is φ = 21141904906.

The previous prime is 21141904853. The next prime is 21141904909. The reversal of 21141904907 is 70940914112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21141904907 - 2¹⁰ = 21141903883 is a prime.

Together with 21141904909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21141904909) 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, 10570952453 + 10570952454.

It is an arithmetic number, because the mean of its divisors is an integer number (10570952454).

Almost surely, 2^21141904907 is an apocalyptic number.

21141904907 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141904907 is an equidigital number, since it uses as much as digits as its factorization.

21141904907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 21141904907 in words is "twenty-one billion, one hundred forty-one million, nine hundred four thousand, nine hundred seven".