20530064 has 10 divisors (see below), whose sum is σ = 39777030. Its totient is φ = 10265024.

The previous prime is 20530039. The next prime is 20530093. The reversal of 20530064 is 46003502.

It can be written as a sum of positive squares in only one way, i.e., 15147664 + 5382400 = 3892^2 + 2320^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641549 + ... + 641580.

It is an arithmetic number, because the mean of its divisors is an integer number (3977703).

Almost surely, 2^20530064 is an apocalyptic number.

It is an amenable number.

20530064 is a deficient number, since it is larger than the sum of its proper divisors (19246966).

20530064 is a wasteful number, since it uses less digits than its factorization.

20530064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283137 (or 1283131 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20530064 is about 4531.0113661301. The cubic root of 20530064 is about 273.8189081689.

Adding to 20530064 its reverse (46003502), we get a palindrome (66533566).

The spelling of 20530064 in words is "twenty million, five hundred thirty thousand, sixty-four".