20123210033 has 4 divisors (see below), whose sum is σ = 20123500020. Its totient is φ = 20122920048.

The previous prime is 20123210027. The next prime is 20123210069. The reversal of 20123210033 is 33001232102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11345019169 + 8778190864 = 106513^2 + 93692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123210033 is a prime.

It is a super-2 number, since 2×20123210033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123209993 and 20123210020.

It is not an unprimeable number, because it can be changed into a prime (20123212033) 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, 27503 + ... + 202491.

It is an arithmetic number, because the mean of its divisors is an integer number (5030875005).

Almost surely, 2^20123210033 is an apocalyptic number.

It is an amenable number.

20123210033 is a deficient number, since it is larger than the sum of its proper divisors (289987).

20123210033 is a wasteful number, since it uses less digits than its factorization.

20123210033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289986.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20123210033 its reverse (33001232102), we get a palindrome (53124442135).

The spelling of 20123210033 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, thirty-three".