173335340021 has 4 divisors (see below), whose sum is σ = 176273227200. Its totient is φ = 170397452844.

The previous prime is 173335339999. The next prime is 173335340023. The reversal of 173335340021 is 120043533371.

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-173335340021 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 173335340021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173335340023) 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, 1468943501 + ... + 1468943618.

It is an arithmetic number, because the mean of its divisors is an integer number (44068306800).

Almost surely, 2^173335340021 is an apocalyptic number.

It is an amenable number.

173335340021 is a deficient number, since it is larger than the sum of its proper divisors (2937887179).

173335340021 is an equidigital number, since it uses as much as digits as its factorization.

173335340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937887178.

The product of its (nonzero) digits is 22680, while the sum is 32.

Adding to 173335340021 its reverse (120043533371), we get a palindrome (293378873392).

The spelling of 173335340021 in words is "one hundred seventy-three billion, three hundred thirty-five million, three hundred forty thousand, twenty-one".