21411432179 has 2 divisors, whose sum is σ = 21411432180. Its totient is φ = 21411432178.

The previous prime is 21411432167. The next prime is 21411432257. The reversal of 21411432179 is 97123411412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21411432179 is a prime.

It is not a weakly prime, because it can be changed into another prime (21411432379) 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, 10705716089 + 10705716090.

It is an arithmetic number, because the mean of its divisors is an integer number (10705716090).

Almost surely, 2^21411432179 is an apocalyptic number.

21411432179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411432179 is an equidigital number, since it uses as much as digits as its factorization.

21411432179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The spelling of 21411432179 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, one hundred seventy-nine".