20280599955 has 144 divisors (see below), whose sum is σ = 44708122368. Its totient is φ = 8409744000.

The previous prime is 20280599929. The next prime is 20280600001. The reversal of 20280599955 is 55999508202.

20280599955 is a `hidden beast` number, since 20 + 28 + 0 + 599 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 20280599955 - 2⁸ = 20280599699 is a prime.

It is a super-2 number, since 2×20280599955² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 19670290 + ... + 19671320.

It is an arithmetic number, because the mean of its divisors is an integer number (310473072).

Almost surely, 2^20280599955 is an apocalyptic number.

20280599955 is an abundant number, since it is smaller than the sum of its proper divisors (24427522413).

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

20280599955 is a wasteful number, since it uses less digits than its factorization.

20280599955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 54.

The spelling of 20280599955 in words is "twenty billion, two hundred eighty million, five hundred ninety-nine thousand, nine hundred fifty-five".