20004356354321 has 4 divisors (see below), whose sum is σ = 20004543895872. Its totient is φ = 20004168812772.

The previous prime is 20004356354303. The next prime is 20004356354329. The reversal of 20004356354321 is 12345365340002.

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 20004356354321 - 2²² = 20004352160017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004356354329) 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, 93610685 + ... + 93824138.

It is an arithmetic number, because the mean of its divisors is an integer number (5001135973968).

Almost surely, 2^{20004356354321} is an apocalyptic number.

It is an amenable number.

20004356354321 is a deficient number, since it is larger than the sum of its proper divisors (187541551).

20004356354321 is a wasteful number, since it uses less digits than its factorization.

20004356354321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187541550.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 20004356354321 in words is "twenty trillion, four billion, three hundred fifty-six million, three hundred fifty-four thousand, three hundred twenty-one".