20001223002423 has 24 divisors (see below), whose sum is σ = 28883119719168. Its totient is φ = 12306051936672.

The previous prime is 20001223002379. The next prime is 20001223002461. The reversal of 20001223002423 is 32420032210002.

It is not a de Polignac number, because 20001223002423 - 2¹⁰ = 20001223001399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001223002423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001223002463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1222815 + ... + 6441872.

It is an arithmetic number, because the mean of its divisors is an integer number (1203463321632).

Almost surely, 2^{20001223002423} is an apocalyptic number.

20001223002423 is a deficient number, since it is larger than the sum of its proper divisors (8881896716745).

20001223002423 is a wasteful number, since it uses less digits than its factorization.

20001223002423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669863 (or 7669850 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20001223002423 its reverse (32420032210002), we get a palindrome (52421255212425).

The spelling of 20001223002423 in words is "twenty trillion, one billion, two hundred twenty-three million, two thousand, four hundred twenty-three".