20530817100 has 54 divisors (see below), whose sum is σ = 64352708420. Its totient is φ = 5474884320.

The previous prime is 20530817093. The next prime is 20530817107. The reversal of 20530817100 is 171803502.

20530817100 is a `hidden beast` number, since 20 + 530 + 8 + 1 + 7 + 100 = 666.

It is an interprime number because it is at equal distance from previous prime (20530817093) and next prime (20530817107).

It is not an unprimeable number, because it can be changed into a prime (20530817107) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11405110 + ... + 11406909.

Almost surely, 2^20530817100 is an apocalyptic number.

20530817100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20530817100 is an abundant number, since it is smaller than the sum of its proper divisors (43821891320).

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

20530817100 is a wasteful number, since it uses less digits than its factorization.

20530817100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22812039 (or 22812029 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 20530817100 in words is "twenty billion, five hundred thirty million, eight hundred seventeen thousand, one hundred".