20023213033 has 4 divisors (see below), whose sum is σ = 20058280528. Its totient is φ = 19988145540.

The previous prime is 20023213019. The next prime is 20023213043. The reversal of 20023213033 is 33031232002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023213033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20023213033.

It is not an unprimeable number, because it can be changed into a prime (20023213043) 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, 17532891 + ... + 17534032.

It is an arithmetic number, because the mean of its divisors is an integer number (5014570132).

Almost surely, 2^20023213033 is an apocalyptic number.

It is an amenable number.

20023213033 is a deficient number, since it is larger than the sum of its proper divisors (35067495).

20023213033 is an equidigital number, since it uses as much as digits as its factorization.

20023213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35067494.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20023213033 its reverse (33031232002), we get a palindrome (53054445035).

The spelling of 20023213033 in words is "twenty billion, twenty-three million, two hundred thirteen thousand, thirty-three".