20420406056604 has 24 divisors (see below), whose sum is σ = 47715585070608. Its totient is φ = 6797091884800.

The previous prime is 20420406056551. The next prime is 20420406056707. The reversal of 20420406056604 is 40665060402402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213757997 + ... + 1213774820.

It is an arithmetic number, because the mean of its divisors is an integer number (1988149377942).

Almost surely, 2^{20420406056604} is an apocalyptic number.

It is an amenable number.

20420406056604 is an abundant number, since it is smaller than the sum of its proper divisors (27295179014004).

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

20420406056604 is a wasteful number, since it uses less digits than its factorization.

20420406056604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427533525 (or 2427533523 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

The spelling of 20420406056604 in words is "twenty trillion, four hundred twenty billion, four hundred six million, fifty-six thousand, six hundred four".