20130240043 has 4 divisors (see below), whose sum is σ = 20149995960. Its totient is φ = 20110484128.

The previous prime is 20130240041. The next prime is 20130240071. The reversal of 20130240043 is 34004203102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20130240043 - 2¹ = 20130240041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20130240043.

It is not an unprimeable number, because it can be changed into a prime (20130240041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9876430 + ... + 9878467.

It is an arithmetic number, because the mean of its divisors is an integer number (5037498990).

Almost surely, 2^20130240043 is an apocalyptic number.

20130240043 is a deficient number, since it is larger than the sum of its proper divisors (19755917).

20130240043 is a wasteful number, since it uses less digits than its factorization.

20130240043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19755916.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20130240043 its reverse (34004203102), we get a palindrome (54134443145).

The spelling of 20130240043 in words is "twenty billion, one hundred thirty million, two hundred forty thousand, forty-three".