20228660408406 has 16 divisors (see below), whose sum is σ = 40766155328448. Its totient is φ = 6691414384200.

The previous prime is 20228660408393. The next prime is 20228660408443. The reversal of 20228660408406 is 60480406682202.

It is a happy number.

It is a super-2 number, since 2×20228660408406² (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, 12868103800 + ... + 12868105371.

It is an arithmetic number, because the mean of its divisors is an integer number (2547884708028).

Almost surely, 2^{20228660408406} is an apocalyptic number.

20228660408406 is an abundant number, since it is smaller than the sum of its proper divisors (20537494920042).

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

20228660408406 is a wasteful number, since it uses less digits than its factorization.

20228660408406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25736209307.

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 20228660408406 in words is "twenty trillion, two hundred twenty-eight billion, six hundred sixty million, four hundred eight thousand, four hundred six".