20506515030 has 96 divisors (see below), whose sum is σ = 58907818944. Its totient is φ = 4922953728.

The previous prime is 20506514993. The next prime is 20506515049. The reversal of 20506515030 is 3051560502.

20506515030 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 651 + 5 + 0 + 3 + 0 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20506514985 and 20506515003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256179 + ... + 326558.

It is an arithmetic number, because the mean of its divisors is an integer number (613623114).

Almost surely, 2^20506515030 is an apocalyptic number.

20506515030 is an abundant number, since it is smaller than the sum of its proper divisors (38401303914).

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

20506515030 is a wasteful number, since it uses less digits than its factorization.

20506515030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582790 (or 582787 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 20506515030 in words is "twenty billion, five hundred six million, five hundred fifteen thousand, thirty".