13530420493 has 2 divisors, whose sum is σ = 13530420494. Its totient is φ = 13530420492.

The previous prime is 13530420461. The next prime is 13530420523. The reversal of 13530420493 is 39402403531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9169403049 + 4361017444 = 95757^2 + 66038^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530420493 - 2⁵ = 13530420461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530420433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765210246 + 6765210247.

It is an arithmetic number, because the mean of its divisors is an integer number (6765210247).

Almost surely, 2^13530420493 is an apocalyptic number.

It is an amenable number.

13530420493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530420493 is an equidigital number, since it uses as much as digits as its factorization.

13530420493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 13530420493 in words is "thirteen billion, five hundred thirty million, four hundred twenty thousand, four hundred ninety-three".