20523404445 has 32 divisors (see below), whose sum is σ = 34832861568. Its totient is φ = 10283040768.

The previous prime is 20523404441. The next prime is 20523404453. The reversal of 20523404445 is 54440432502.

It is not a de Polignac number, because 20523404445 - 2² = 20523404441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523404441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65917 + ... + 213053.

It is an arithmetic number, because the mean of its divisors is an integer number (1088526924).

Almost surely, 2^20523404445 is an apocalyptic number.

It is an amenable number.

20523404445 is a deficient number, since it is larger than the sum of its proper divisors (14309457123).

20523404445 is a wasteful number, since it uses less digits than its factorization.

20523404445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147709.

The product of its (nonzero) digits is 76800, while the sum is 33.

Adding to 20523404445 its reverse (54440432502), we get a palindrome (74963836947).

The spelling of 20523404445 in words is "twenty billion, five hundred twenty-three million, four hundred four thousand, four hundred forty-five".