20550481680 has 40 divisors (see below), whose sum is σ = 63706493952. Its totient is φ = 5480128384.

The previous prime is 20550481673. The next prime is 20550481687. The reversal of 20550481680 is 8618405502.

It is an interprime number because it is at equal distance from previous prime (20550481673) and next prime (20550481687).

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

It is not an unprimeable number, because it can be changed into a prime (20550481687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42813264 + ... + 42813743.

Almost surely, 2^20550481680 is an apocalyptic number.

20550481680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20550481680 is an abundant number, since it is smaller than the sum of its proper divisors (43156012272).

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

20550481680 is a wasteful number, since it uses less digits than its factorization.

20550481680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85627023 (or 85627017 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 20550481680 in words is "twenty billion, five hundred fifty million, four hundred eighty-one thousand, six hundred eighty".