20448309541 has 4 divisors (see below), whose sum is σ = 22307246784. Its totient is φ = 18589372300.

The previous prime is 20448309521. The next prime is 20448309587. The reversal of 20448309541 is 14590384402.

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 20448309541 - 2²¹ = 20446212389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20448309494 and 20448309503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448309521) 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, 929468605 + ... + 929468626.

It is an arithmetic number, because the mean of its divisors is an integer number (5576811696).

Almost surely, 2^20448309541 is an apocalyptic number.

It is an amenable number.

20448309541 is a deficient number, since it is larger than the sum of its proper divisors (1858937243).

20448309541 is a wasteful number, since it uses less digits than its factorization.

20448309541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858937242.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 20448309541 in words is "twenty billion, four hundred forty-eight million, three hundred nine thousand, five hundred forty-one".