20243134140 has 48 divisors (see below), whose sum is σ = 57182394528. Its totient is φ = 5350395904.

The previous prime is 20243134099. The next prime is 20243134151. The reversal of 20243134140 is 4143134202.

It is a self number, because there is not a number n which added to its sum of digits gives 20243134140.

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, 1486077 + ... + 1499636.

It is an arithmetic number, because the mean of its divisors is an integer number (1191299886).

Almost surely, 2^20243134140 is an apocalyptic number.

20243134140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20243134140 is an abundant number, since it is smaller than the sum of its proper divisors (36939260388).

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

20243134140 is a wasteful number, since it uses less digits than its factorization.

20243134140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985838 (or 2985836 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20243134140 its reverse (4143134202), we get a palindrome (24386268342).

The spelling of 20243134140 in words is "twenty billion, two hundred forty-three million, one hundred thirty-four thousand, one hundred forty".