20533521044 has 6 divisors (see below), whose sum is σ = 35933661834. Its totient is φ = 10266760520.

The previous prime is 20533521031. The next prime is 20533521059. The reversal of 20533521044 is 44012533502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10949111044 + 9584410000 = 104638^2 + 97900^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20533520998 and 20533521016.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2566690127 + ... + 2566690134.

It is an arithmetic number, because the mean of its divisors is an integer number (5988943639).

Almost surely, 2^20533521044 is an apocalyptic number.

It is an amenable number.

20533521044 is a deficient number, since it is larger than the sum of its proper divisors (15400140790).

20533521044 is a wasteful number, since it uses less digits than its factorization.

20533521044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133380265 (or 5133380263 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 20533521044 in words is "twenty billion, five hundred thirty-three million, five hundred twenty-one thousand, forty-four".