20453323355 has 4 divisors (see below), whose sum is σ = 24543988032. Its totient is φ = 16362658680.

The previous prime is 20453323259. The next prime is 20453323379. The reversal of 20453323355 is 55332335402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55332335402 = 2 ⋅27666167701.

It is not a de Polignac number, because 20453323355 - 2³² = 16158356059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045332331 + ... + 2045332340.

It is an arithmetic number, because the mean of its divisors is an integer number (6135997008).

Almost surely, 2^20453323355 is an apocalyptic number.

20453323355 is a deficient number, since it is larger than the sum of its proper divisors (4090664677).

20453323355 is an equidigital number, since it uses as much as digits as its factorization.

20453323355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090664676.

The product of its (nonzero) digits is 162000, while the sum is 35.

Adding to 20453323355 its reverse (55332335402), we get a palindrome (75785658757).

The spelling of 20453323355 in words is "twenty billion, four hundred fifty-three million, three hundred twenty-three thousand, three hundred fifty-five".