20354205453773 has 4 divisors (see below), whose sum is σ = 20358012118080. Its totient is φ = 20350398789468.

The previous prime is 20354205453719. The next prime is 20354205453821. The reversal of 20354205453773 is 37735450245302.

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 20354205453773 - 2¹⁸ = 20354205191629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354205452773) 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, 1903324133 + ... + 1903334826.

It is an arithmetic number, because the mean of its divisors is an integer number (5089503029520).

Almost surely, 2^{20354205453773} is an apocalyptic number.

It is an amenable number.

20354205453773 is a deficient number, since it is larger than the sum of its proper divisors (3806664307).

20354205453773 is an equidigital number, since it uses as much as digits as its factorization.

20354205453773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806664306.

The product of its (nonzero) digits is 10584000, while the sum is 50.

The spelling of 20354205453773 in words is "twenty trillion, three hundred fifty-four billion, two hundred five million, four hundred fifty-three thousand, seven hundred seventy-three".