20123001000 has 192 divisors, whose sum is σ = 68401195200. Its totient is φ = 5335728000.

The previous prime is 20123000999. The next prime is 20123001007. The reversal of 20123001000 is 10032102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20123001007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1604755 + ... + 1617245.

It is an arithmetic number, because the mean of its divisors is an integer number (356256225).

Almost surely, 2^20123001000 is an apocalyptic number.

20123001000 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 20123001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34200597600).

20123001000 is an abundant number, since it is smaller than the sum of its proper divisors (48278194200).

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

20123001000 is a wasteful number, since it uses less digits than its factorization.

20123001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12697 (or 12680 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20123001000 its reverse (10032102), we get a palindrome (20133033102).

The spelling of 20123001000 in words is "twenty billion, one hundred twenty-three million, one thousand".