20555442025500 has 96 divisors (see below), whose sum is σ = 59859687521088. Its totient is φ = 5481246048000.

The previous prime is 20555442025493. The next prime is 20555442025501. The reversal of 20555442025500 is 552024455502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555442025501) 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, 42173190 + ... + 42657810.

It is an arithmetic number, because the mean of its divisors is an integer number (623538411678).

Almost surely, 2^{20555442025500} is an apocalyptic number.

20555442025500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20555442025500 is an abundant number, since it is smaller than the sum of its proper divisors (39304245495588).

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

20555442025500 is a wasteful number, since it uses less digits than its factorization.

20555442025500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512920 (or 512908 counting only the distinct ones).

The product of its (nonzero) digits is 400000, while the sum is 39.

The spelling of 20555442025500 in words is "twenty trillion, five hundred fifty-five billion, four hundred forty-two million, twenty-five thousand, five hundred".