20532641 has 2 divisors, whose sum is σ = 20532642. Its totient is φ = 20532640.

The previous prime is 20532613. The next prime is 20532683. The reversal of 20532641 is 14623502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 4532641 = 4000^2 + 2129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20532641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20532341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266320 + 10266321.

It is an arithmetic number, because the mean of its divisors is an integer number (10266321).

Almost surely, 2^20532641 is an apocalyptic number.

It is an amenable number.

20532641 is a deficient number, since it is larger than the sum of its proper divisors (1).

20532641 is an equidigital number, since it uses as much as digits as its factorization.

20532641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20532641 is about 4531.2957308037. The cubic root of 20532641 is about 273.8303645677.

The spelling of 20532641 in words is "twenty million, five hundred thirty-two thousand, six hundred forty-one".