21422062187 has 2 divisors, whose sum is σ = 21422062188. Its totient is φ = 21422062186.

The previous prime is 21422062159. The next prime is 21422062231. The reversal of 21422062187 is 78126022412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422062187 - 2¹⁰ = 21422061163 is a prime.

It is not a weakly prime, because it can be changed into another prime (21422062127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711031093 + 10711031094.

It is an arithmetic number, because the mean of its divisors is an integer number (10711031094).

Almost surely, 2^21422062187 is an apocalyptic number.

21422062187 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422062187 is an equidigital number, since it uses as much as digits as its factorization.

21422062187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

Adding to 21422062187 its reverse (78126022412), we get a palindrome (99548084599).

The spelling of 21422062187 in words is "twenty-one billion, four hundred twenty-two million, sixty-two thousand, one hundred eighty-seven".