17406874021 has 2 divisors, whose sum is σ = 17406874022. Its totient is φ = 17406874020.

The previous prime is 17406874003. The next prime is 17406874049. The reversal of 17406874021 is 12047860471.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12959317921 + 4447556100 = 113839^2 + 66690^2 .

It is a cyclic number.

It is not a de Polignac number, because 17406874021 - 2¹³ = 17406865829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17406874091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8703437010 + 8703437011.

It is an arithmetic number, because the mean of its divisors is an integer number (8703437011).

Almost surely, 2^17406874021 is an apocalyptic number.

It is an amenable number.

17406874021 is a deficient number, since it is larger than the sum of its proper divisors (1).

17406874021 is an equidigital number, since it uses as much as digits as its factorization.

17406874021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 17406874021 in words is "seventeen billion, four hundred six million, eight hundred seventy-four thousand, twenty-one".