20012134040 has 64 divisors (see below), whose sum is σ = 45487094400. Its totient is φ = 7923267072.

The previous prime is 20012134033. The next prime is 20012134049. The reversal of 20012134040 is 4043121002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012134049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5984609 + ... + 5987951.

It is an arithmetic number, because the mean of its divisors is an integer number (710735850).

Almost surely, 2^20012134040 is an apocalyptic number.

20012134040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012134040 is an abundant number, since it is smaller than the sum of its proper divisors (25474960360).

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

20012134040 is a wasteful number, since it uses less digits than its factorization.

20012134040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20012134040 its reverse (4043121002), we get a palindrome (24055255042).

The spelling of 20012134040 in words is "twenty billion, twelve million, one hundred thirty-four thousand, forty".