19530135724453 has 4 divisors (see below), whose sum is σ = 19861154974080. Its totient is φ = 19199116474828.

The previous prime is 19530135724439. The next prime is 19530135724487. The reversal of 19530135724453 is 35442753103591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19530135724453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19530135724453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19530135724753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165509624725 + ... + 165509624842.

It is an arithmetic number, because the mean of its divisors is an integer number (4965288743520).

Almost surely, 2^{19530135724453} is an apocalyptic number.

It is an amenable number.

19530135724453 is a deficient number, since it is larger than the sum of its proper divisors (331019249627).

19530135724453 is an equidigital number, since it uses as much as digits as its factorization.

19530135724453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331019249626.

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 19530135724453 in words is "nineteen trillion, five hundred thirty billion, one hundred thirty-five million, seven hundred twenty-four thousand, four hundred fifty-three".