20012123000 has 64 divisors (see below), whose sum is σ = 46884895200. Its totient is φ = 7995187200.

The previous prime is 20012122981. The next prime is 20012123039. The reversal of 20012123000 is 32121002.

It is a happy number.

It is a congruent number.

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, 847352 + ... + 870648.

Almost surely, 2^20012123000 is an apocalyptic number.

20012123000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012123000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23442447600).

20012123000 is an abundant number, since it is smaller than the sum of its proper divisors (26872772200).

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

20012123000 is a wasteful number, since it uses less digits than its factorization.

20012123000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24177 (or 24163 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20012123000 its reverse (32121002), we get a palindrome (20044244002).

The spelling of 20012123000 in words is "twenty billion, twelve million, one hundred twenty-three thousand".