84024842021 has 2 divisors, whose sum is σ = 84024842022. Its totient is φ = 84024842020.

The previous prime is 84024841993. The next prime is 84024842053. The reversal of 84024842021 is 12024842048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59411625025 + 24613216996 = 243745^2 + 156886^2 .

It is a cyclic number.

It is not a de Polignac number, because 84024842021 - 2³⁴ = 66844972837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84024842221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42012421010 + 42012421011.

It is an arithmetic number, because the mean of its divisors is an integer number (42012421011).

Almost surely, 2^84024842021 is an apocalyptic number.

It is an amenable number.

84024842021 is a deficient number, since it is larger than the sum of its proper divisors (1).

84024842021 is an equidigital number, since it uses as much as digits as its factorization.

84024842021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32768, while the sum is 35.

The spelling of 84024842021 in words is "eighty-four billion, twenty-four million, eight hundred forty-two thousand, twenty-one".