20351656404606 has 16 divisors (see below), whose sum is σ = 40770369345024. Its totient is φ = 6772709378904.

The previous prime is 20351656404589. The next prime is 20351656404619. The reversal of 20351656404606 is 60640465615302.

It is a super-2 number, since 2×20351656404606² (a number of 27 digits) contains 22 as substring.

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, 2794018380 + ... + 2794025663.

It is an arithmetic number, because the mean of its divisors is an integer number (2548148084064).

Almost surely, 2^{20351656404606} is an apocalyptic number.

20351656404606 is an abundant number, since it is smaller than the sum of its proper divisors (20418712940418).

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

20351656404606 is a wasteful number, since it uses less digits than its factorization.

20351656404606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588044655.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 20351656404606 in words is "twenty trillion, three hundred fifty-one billion, six hundred fifty-six million, four hundred four thousand, six hundred six".