20201205445 has 8 divisors (see below), whose sum is σ = 24252374520. Its totient is φ = 16153679040.

The previous prime is 20201205413. The next prime is 20201205457. The reversal of 20201205445 is 54450210202.

It can be written as a sum of positive squares in 4 ways, for example, as 5121119844 + 15080085601 = 71562^2 + 122801^2 .

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

It is not a de Polignac number, because 20201205445 - 2⁵ = 20201205413 is a prime.

It is a congruent 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, 898450 + ... + 920659.

It is an arithmetic number, because the mean of its divisors is an integer number (3031546815).

Almost surely, 2^20201205445 is an apocalyptic number.

It is an amenable number.

20201205445 is a deficient number, since it is larger than the sum of its proper divisors (4051169075).

20201205445 is a wasteful number, since it uses less digits than its factorization.

20201205445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821335.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20201205445 its reverse (54450210202), we get a palindrome (74651415647).

The spelling of 20201205445 in words is "twenty billion, two hundred one million, two hundred five thousand, four hundred forty-five".