20420333430233 has 8 divisors (see below), whose sum is σ = 22282117393536. Its totient is φ = 18559447802800.

The previous prime is 20420333430209. The next prime is 20420333430257. The reversal of 20420333430233 is 33203433302402.

It is an interprime number because it is at equal distance from previous prime (20420333430209) and next prime (20420333430257).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20420333430233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20420333430233.

It is not an unprimeable number, because it can be changed into a prime (20420333430733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224536433 + ... + 224627358.

It is an arithmetic number, because the mean of its divisors is an integer number (2785264674192).

Almost surely, 2^{20420333430233} is an apocalyptic number.

It is an amenable number.

20420333430233 is a deficient number, since it is larger than the sum of its proper divisors (1861783963303).

20420333430233 is a wasteful number, since it uses less digits than its factorization.

20420333430233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449167935.

The product of its (nonzero) digits is 93312, while the sum is 32.

Adding to 20420333430233 its reverse (33203433302402), we get a palindrome (53623766732635).

The spelling of 20420333430233 in words is "twenty trillion, four hundred twenty billion, three hundred thirty-three million, four hundred thirty thousand, two hundred thirty-three".