20445051545 has 8 divisors (see below), whose sum is σ = 25104621696. Its totient is φ = 15975668016.

The previous prime is 20445051503. The next prime is 20445051563. The reversal of 20445051545 is 54515054402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20445051545 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47546417 + ... + 47546846.

It is an arithmetic number, because the mean of its divisors is an integer number (3138077712).

Almost surely, 2^20445051545 is an apocalyptic number.

It is an amenable number.

20445051545 is a deficient number, since it is larger than the sum of its proper divisors (4659570151).

20445051545 is an equidigital number, since it uses as much as digits as its factorization.

20445051545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95093311.

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 20445051545 in words is "twenty billion, four hundred forty-five million, fifty-one thousand, five hundred forty-five".