21142860967 has 2 divisors, whose sum is σ = 21142860968. Its totient is φ = 21142860966.

The previous prime is 21142860953. The next prime is 21142860989. The reversal of 21142860967 is 76906824112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142860967 - 2¹⁹ = 21142336679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142863967) 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, 10571430483 + 10571430484.

It is an arithmetic number, because the mean of its divisors is an integer number (10571430484).

Almost surely, 2^21142860967 is an apocalyptic number.

21142860967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142860967 is an equidigital number, since it uses as much as digits as its factorization.

21142860967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 21142860967 in words is "twenty-one billion, one hundred forty-two million, eight hundred sixty thousand, nine hundred sixty-seven".