20485544873 has 4 divisors (see below), whose sum is σ = 20496046848. Its totient is φ = 20475042900.

The previous prime is 20485544869. The next prime is 20485544897. The reversal of 20485544873 is 37844558402.

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 20485544873 - 2² = 20485544869 is a prime.

It is a super-2 number, since 2×20485544873² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485543873) 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, 5248061 + ... + 5251962.

It is an arithmetic number, because the mean of its divisors is an integer number (5124011712).

Almost surely, 2^20485544873 is an apocalyptic number.

It is an amenable number.

20485544873 is a deficient number, since it is larger than the sum of its proper divisors (10501975).

20485544873 is a wasteful number, since it uses less digits than its factorization.

20485544873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501974.

The product of its (nonzero) digits is 4300800, while the sum is 50.

The spelling of 20485544873 in words is "twenty billion, four hundred eighty-five million, five hundred forty-four thousand, eight hundred seventy-three".