20623444033 has 8 divisors (see below), whose sum is σ = 20741750568. Its totient is φ = 20505464064.

The previous prime is 20623444019. The next prime is 20623444043. The reversal of 20623444033 is 33044432602.

It can be written as a sum of positive squares in 4 ways, for example, as 6061712449 + 14561731584 = 77857^2 + 120672^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20623444033 - 2²¹ = 20621346881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20623443986 and 20623444004.

It is not an unprimeable number, because it can be changed into a prime (20623444013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45591 + ... + 208147.

It is an arithmetic number, because the mean of its divisors is an integer number (2592718821).

Almost surely, 2^20623444033 is an apocalyptic number.

It is an amenable number.

20623444033 is a deficient number, since it is larger than the sum of its proper divisors (118306535).

20623444033 is a wasteful number, since it uses less digits than its factorization.

20623444033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163283.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 20623444033 its reverse (33044432602), we get a palindrome (53667876635).

The spelling of 20623444033 in words is "twenty billion, six hundred twenty-three million, four hundred forty-four thousand, thirty-three".