17135234657421 has 4 divisors (see below), whose sum is σ = 22846979543232. Its totient is φ = 11423489771612.

The previous prime is 17135234657417. The next prime is 17135234657503. The reversal of 17135234657421 is 12475643253171.

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 not a de Polignac number, because 17135234657421 - 2² = 17135234657417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17135234657221) 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, 2855872442901 + ... + 2855872442906.

It is an arithmetic number, because the mean of its divisors is an integer number (5711744885808).

Almost surely, 2^{17135234657421} is an apocalyptic number.

It is an amenable number.

17135234657421 is a deficient number, since it is larger than the sum of its proper divisors (5711744885811).

17135234657421 is an equidigital number, since it uses as much as digits as its factorization.

17135234657421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711744885810.

The product of its digits is 4233600, while the sum is 51.

The spelling of 17135234657421 in words is "seventeen trillion, one hundred thirty-five billion, two hundred thirty-four million, six hundred fifty-seven thousand, four hundred twenty-one".