20404124140 has 48 divisors (see below), whose sum is σ = 43211296800. Its totient is φ = 8092726272.

The previous prime is 20404124137. The next prime is 20404124161. The reversal of 20404124140 is 4142140402.

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, 2433876 + ... + 2442244.

It is an arithmetic number, because the mean of its divisors is an integer number (900235350).

Almost surely, 2^20404124140 is an apocalyptic number.

20404124140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404124140 is an abundant number, since it is smaller than the sum of its proper divisors (22807172660).

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

20404124140 is a wasteful number, since it uses less digits than its factorization.

20404124140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394 (or 9392 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20404124140 its reverse (4142140402), we get a palindrome (24546264542).

The spelling of 20404124140 in words is "twenty billion, four hundred four million, one hundred twenty-four thousand, one hundred forty".