20513401174406 has 48 divisors (see below), whose sum is σ = 38050303051152. Its totient is φ = 8241347520000.

The previous prime is 20513401174403. The next prime is 20513401174421. The reversal of 20513401174406 is 60447110431502.

It is a self number, because there is not a number n which added to its sum of digits gives 20513401174406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513401174403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24109655 + ... + 24945986.

It is an arithmetic number, because the mean of its divisors is an integer number (792714646899).

Almost surely, 2^{20513401174406} is an apocalyptic number.

20513401174406 is a deficient number, since it is larger than the sum of its proper divisors (17536901876746).

20513401174406 is a wasteful number, since it uses less digits than its factorization.

20513401174406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49055925 (or 49055918 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 20513401174406 in words is "twenty trillion, five hundred thirteen billion, four hundred one million, one hundred seventy-four thousand, four hundred six".