20110123140 has 192 divisors, whose sum is σ = 62676923904. Its totient is φ = 4791795712.

The previous prime is 20110123091. The next prime is 20110123199. The reversal of 20110123140 is 4132101102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3210892 + ... + 3217148.

It is an arithmetic number, because the mean of its divisors is an integer number (326442312).

Almost surely, 2^20110123140 is an apocalyptic number.

20110123140 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 20110123140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31338461952).

20110123140 is an abundant number, since it is smaller than the sum of its proper divisors (42566800764).

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

20110123140 is a wasteful number, since it uses less digits than its factorization.

20110123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446 (or 6444 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20110123140 its reverse (4132101102), we get a palindrome (24242224242).

The spelling of 20110123140 in words is "twenty billion, one hundred ten million, one hundred twenty-three thousand, one hundred forty".