20532605 has 4 divisors (see below), whose sum is σ = 24639132. Its totient is φ = 16426080.

The previous prime is 20532569. The next prime is 20532613. The reversal of 20532605 is 50623502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8602489 + 11930116 = 2933^2 + 3454^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20532605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053256 + ... + 2053265.

It is an arithmetic number, because the mean of its divisors is an integer number (6159783).

Almost surely, 2^20532605 is an apocalyptic number.

It is an amenable number.

20532605 is a deficient number, since it is larger than the sum of its proper divisors (4106527).

20532605 is an equidigital number, since it uses as much as digits as its factorization.

20532605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106526.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20532605 is about 4531.2917584283. The cubic root of 20532605 is about 273.8302045315.

The spelling of 20532605 in words is "twenty million, five hundred thirty-two thousand, six hundred five".