20420140412 has 12 divisors (see below), whose sum is σ = 40840280880. Its totient is φ = 8751488736.

The previous prime is 20420140409. The next prime is 20420140421. The reversal of 20420140412 is 21404102402.

20420140412 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364645337 + ... + 364645392.

It is an arithmetic number, because the mean of its divisors is an integer number (3403356740).

Almost surely, 2^20420140412 is an apocalyptic number.

It is an amenable number.

20420140412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20420140412 is a wasteful number, since it uses less digits than its factorization.

20420140412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729290740 (or 729290738 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20420140412 its reverse (21404102402), we get a palindrome (41824242814).

The spelling of 20420140412 in words is "twenty billion, four hundred twenty million, one hundred forty thousand, four hundred twelve".