20430440033 has 4 divisors (see below), whose sum is σ = 20436092100. Its totient is φ = 20424787968.

The previous prime is 20430440027. The next prime is 20430440039. The reversal of 20430440033 is 33004403402.

20430440033 = 327² + 328² + ... + 3943².

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20430440027) and next prime (20430440039).

It can be written as a sum of positive squares in 2 ways, for example, as 222964624 + 20207475409 = 14932^2 + 142153^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430440033 - 2⁶ = 20430439969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20430439990 and 20430440008.

It is not an unprimeable number, because it can be changed into a prime (20430440039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2820608 + ... + 2827841.

It is an arithmetic number, because the mean of its divisors is an integer number (5109023025).

Almost surely, 2^20430440033 is an apocalyptic number.

It is an amenable number.

20430440033 is a deficient number, since it is larger than the sum of its proper divisors (5652067).

20430440033 is an equidigital number, since it uses as much as digits as its factorization.

20430440033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5652066.

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

Adding to 20430440033 its reverse (33004403402), we get a palindrome (53434843435).

The spelling of 20430440033 in words is "twenty billion, four hundred thirty million, four hundred forty thousand, thirty-three".