20112434140 has 12 divisors (see below), whose sum is σ = 42236111736. Its totient is φ = 8044973648.

The previous prime is 20112434101. The next prime is 20112434149. The reversal of 20112434140 is 4143421102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112434149) 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, 502810834 + ... + 502810873.

It is an arithmetic number, because the mean of its divisors is an integer number (3519675978).

Almost surely, 2^20112434140 is an apocalyptic number.

20112434140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112434140 is an abundant number, since it is smaller than the sum of its proper divisors (22123677596).

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

20112434140 is a wasteful number, since it uses less digits than its factorization.

20112434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005621716 (or 1005621714 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20112434140 its reverse (4143421102), we get a palindrome (24255855242).

The spelling of 20112434140 in words is "twenty billion, one hundred twelve million, four hundred thirty-four thousand, one hundred forty".