20435448081 has 8 divisors (see below), whose sum is σ = 28681330720. Its totient is φ = 12906598752.

The previous prime is 20435448073. The next prime is 20435448169. The reversal of 20435448081 is 18084453402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20435448081 - 2³ = 20435448073 is a prime.

It is a super-2 number, since 2×20435448081² (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 (20435448071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179258260 + ... + 179258373.

It is an arithmetic number, because the mean of its divisors is an integer number (3585166340).

Almost surely, 2^20435448081 is an apocalyptic number.

It is an amenable number.

20435448081 is a deficient number, since it is larger than the sum of its proper divisors (8245882639).

20435448081 is a wasteful number, since it uses less digits than its factorization.

20435448081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358516655.

The product of its (nonzero) digits is 122880, while the sum is 39.

The spelling of 20435448081 in words is "twenty billion, four hundred thirty-five million, four hundred forty-eight thousand, eighty-one".