20346580493 has 2 divisors, whose sum is σ = 20346580494. Its totient is φ = 20346580492.

The previous prime is 20346580489. The next prime is 20346580531. The reversal of 20346580493 is 39408564302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10600349764 + 9746230729 = 102958^2 + 98723^2 .

It is a cyclic number.

It is not a de Polignac number, because 20346580493 - 2² = 20346580489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20346580693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173290246 + 10173290247.

It is an arithmetic number, because the mean of its divisors is an integer number (10173290247).

Almost surely, 2^20346580493 is an apocalyptic number.

It is an amenable number.

20346580493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20346580493 is an equidigital number, since it uses as much as digits as its factorization.

20346580493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 20346580493 in words is "twenty billion, three hundred forty-six million, five hundred eighty thousand, four hundred ninety-three".