20020243433 has 8 divisors (see below), whose sum is σ = 20067394728. Its totient is φ = 19973136384.

The previous prime is 20020243429. The next prime is 20020243447. The reversal of 20020243433 is 33434202002.

It can be written as a sum of positive squares in 4 ways, for example, as 6361179049 + 13659064384 = 79757^2 + 116872^2 .

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 20020243433 - 2² = 20020243429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020243399 and 20020243408.

It is not an unprimeable number, because it can be changed into a prime (20020243933) 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, 1001585 + ... + 1021377.

It is an arithmetic number, because the mean of its divisors is an integer number (2508424341).

Almost surely, 2^20020243433 is an apocalyptic number.

It is an amenable number.

20020243433 is a deficient number, since it is larger than the sum of its proper divisors (47151295).

20020243433 is a wasteful number, since it uses less digits than its factorization.

20020243433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20020243433 its reverse (33434202002), we get a palindrome (53454445435).

The spelling of 20020243433 in words is "twenty billion, twenty million, two hundred forty-three thousand, four hundred thirty-three".