20001123234 has 32 divisors (see below), whose sum is σ = 45531017280. Its totient is φ = 6504429600.

The previous prime is 20001123229. The next prime is 20001123253. The reversal of 20001123234 is 43232110002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4514752 + ... + 4519179.

It is an arithmetic number, because the mean of its divisors is an integer number (1422844290).

Almost surely, 2^20001123234 is an apocalyptic number.

20001123234 is an abundant number, since it is smaller than the sum of its proper divisors (25529894046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001123234 is a wasteful number, since it uses less digits than its factorization.

20001123234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033983 (or 9033977 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20001123234 its reverse (43232110002), we get a palindrome (63233233236).

The spelling of 20001123234 in words is "twenty billion, one million, one hundred twenty-three thousand, two hundred thirty-four".