20420555240412 has 120 divisors (see below), whose sum is σ = 55826281696416. Its totient is φ = 6496653537792.

The previous prime is 20420555240387. The next prime is 20420555240429. The reversal of 20420555240412 is 21404255502402.

20420555240412 is a `hidden beast` number, since 2 + 0 + 4 + 20 + 5 + 552 + 40 + 41 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 407448 + ... + 6403680.

Almost surely, 2^{20420555240412} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20420555240412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27913140848208).

20420555240412 is an abundant number, since it is smaller than the sum of its proper divisors (35405726456004).

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

20420555240412 is a wasteful number, since it uses less digits than its factorization.

20420555240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996729 (or 5996718 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

The spelling of 20420555240412 in words is "twenty trillion, four hundred twenty billion, five hundred fifty-five million, two hundred forty thousand, four hundred twelve".