20453573873 has 4 divisors (see below), whose sum is σ = 20539153920. Its totient is φ = 20367993828.

The previous prime is 20453573869. The next prime is 20453573911. The reversal of 20453573873 is 37837535402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37837535402 = 2 ⋅18918767701.

It is a cyclic number.

It is not a de Polignac number, because 20453573873 - 2² = 20453573869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20453573573) 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, 42789665 + ... + 42790142.

It is an arithmetic number, because the mean of its divisors is an integer number (5134788480).

Almost surely, 2^20453573873 is an apocalyptic number.

It is an amenable number.

20453573873 is a deficient number, since it is larger than the sum of its proper divisors (85580047).

20453573873 is an equidigital number, since it uses as much as digits as its factorization.

20453573873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85580046.

The product of its (nonzero) digits is 2116800, while the sum is 47.

The spelling of 20453573873 in words is "twenty billion, four hundred fifty-three million, five hundred seventy-three thousand, eight hundred seventy-three".