20404124412 has 96 divisors (see below), whose sum is σ = 56987664384. Its totient is φ = 5555563200.

The previous prime is 20404124393. The next prime is 20404124431. The reversal of 20404124412 is 21442140402.

It is an interprime number because it is at equal distance from previous prime (20404124393) and next prime (20404124431).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504087 + ... + 543057.

It is an arithmetic number, because the mean of its divisors is an integer number (593621504).

Almost surely, 2^20404124412 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 20404124412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28493832192).

20404124412 is an abundant number, since it is smaller than the sum of its proper divisors (36583539972).

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

20404124412 is a wasteful number, since it uses less digits than its factorization.

20404124412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39279 (or 39277 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 20404124412 its reverse (21442140402), we get a palindrome (41846264814).

The spelling of 20404124412 in words is "twenty billion, four hundred four million, one hundred twenty-four thousand, four hundred twelve".