20045606656020 has 96 divisors (see below), whose sum is σ = 61232430905856. Its totient is φ = 4859365276800.

The previous prime is 20045606656013. The next prime is 20045606656027. The reversal of 20045606656020 is 2065660654002.

It is an interprime number because it is at equal distance from previous prime (20045606656013) and next prime (20045606656027).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045606656027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18200455 + ... + 19270385.

It is an arithmetic number, because the mean of its divisors is an integer number (637837821936).

Almost surely, 2^{20045606656020} is an apocalyptic number.

20045606656020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045606656020 is an abundant number, since it is smaller than the sum of its proper divisors (41186824249836).

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

20045606656020 is a wasteful number, since it uses less digits than its factorization.

20045606656020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098341 (or 1098339 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20045606656020 in words is "twenty trillion, forty-five billion, six hundred six million, six hundred fifty-six thousand, twenty".