20228808686640 has 40 divisors (see below), whose sum is σ = 62709306929328. Its totient is φ = 5394348983040.

The previous prime is 20228808686599. The next prime is 20228808686659. The reversal of 20228808686640 is 4668680882202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 42143351191 + ... + 42143351670.

Almost surely, 2^{20228808686640} is an apocalyptic number.

20228808686640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20228808686640 is an abundant number, since it is smaller than the sum of its proper divisors (42480498242688).

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

20228808686640 is a wasteful number, since it uses less digits than its factorization.

20228808686640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84286702877 (or 84286702871 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 60.

The spelling of 20228808686640 in words is "twenty trillion, two hundred twenty-eight billion, eight hundred eight million, six hundred eighty-six thousand, six hundred forty".