20532617 has 18 divisors (see below), whose sum is σ = 25451982. Its totient is φ = 16458624.

The previous prime is 20532613. The next prime is 20532641. The reversal of 20532617 is 71623502.

It can be written as a sum of positive squares in 3 ways, for example, as 2119936 + 18412681 = 1456^2 + 4291^2 .

It is not a de Polignac number, because 20532617 - 2² = 20532613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532613) 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, 130703 + ... + 130859.

It is an arithmetic number, because the mean of its divisors is an integer number (1413999).

Almost surely, 2^20532617 is an apocalyptic number.

It is an amenable number.

20532617 is a deficient number, since it is larger than the sum of its proper divisors (4919365).

20532617 is an equidigital number, since it uses as much as digits as its factorization.

20532617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20532617 is about 4531.2930825538. The cubic root of 20532617 is about 273.8302578769.

The spelling of 20532617 in words is "twenty million, five hundred thirty-two thousand, six hundred seventeen".