20527451217 has 128 divisors (see below), whose sum is σ = 39249100800. Its totient is φ = 10305833472.

The previous prime is 20527451213. The next prime is 20527451267. The reversal of 20527451217 is 71215472502.

20527451217 is a `hidden beast` number, since 2 + 0 + 527 + 4 + 5 + 121 + 7 = 666.

It is not a de Polignac number, because 20527451217 - 2² = 20527451213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20527451213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13166284 + ... + 13167842.

It is an arithmetic number, because the mean of its divisors is an integer number (306633600).

Almost surely, 2^20527451217 is an apocalyptic number.

20527451217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20527451217 is a deficient number, since it is larger than the sum of its proper divisors (18721649583).

20527451217 is a wasteful number, since it uses less digits than its factorization.

20527451217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844 (or 1838 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The spelling of 20527451217 in words is "twenty billion, five hundred twenty-seven million, four hundred fifty-one thousand, two hundred seventeen".