21670973143 has 2 divisors, whose sum is σ = 21670973144. Its totient is φ = 21670973142.

The previous prime is 21670973101. The next prime is 21670973179. The reversal of 21670973143 is 34137907612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21670973143 - 2¹³ = 21670964951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21670973143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21670973183) 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, 10835486571 + 10835486572.

It is an arithmetic number, because the mean of its divisors is an integer number (10835486572).

Almost surely, 2^21670973143 is an apocalyptic number.

21670973143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21670973143 is an equidigital number, since it uses as much as digits as its factorization.

21670973143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 21670973143 in words is "twenty-one billion, six hundred seventy million, nine hundred seventy-three thousand, one hundred forty-three".