20535504120 has 48 divisors (see below), whose sum is σ = 66740389560. Its totient is φ = 5476134336.

The previous prime is 20535504079. The next prime is 20535504131. The reversal of 20535504120 is 2140553502.

It is a happy number.

20535504120 is a `hidden beast` number, since 2 + 0 + 5 + 35 + 504 + 120 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28521174 + ... + 28521893.

Almost surely, 2^20535504120 is an apocalyptic number.

20535504120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20535504120 is an abundant number, since it is smaller than the sum of its proper divisors (46204885440).

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

20535504120 is a wasteful number, since it uses less digits than its factorization.

20535504120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57043084 (or 57043077 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The spelling of 20535504120 in words is "twenty billion, five hundred thirty-five million, five hundred four thousand, one hundred twenty".