20530436 has 12 divisors (see below), whose sum is σ = 36764112. Its totient is φ = 10026408.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530436 is 63403502.

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, 59510 + ... + 59853.

It is an arithmetic number, because the mean of its divisors is an integer number (3063676).

Almost surely, 2^20530436 is an apocalyptic number.

It is an amenable number.

20530436 is a deficient number, since it is larger than the sum of its proper divisors (16233676).

20530436 is a wasteful number, since it uses less digits than its factorization.

20530436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119410 (or 119408 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20530436 is about 4531.0524163819. The cubic root of 20530436 is about 273.8205620040.

Adding to 20530436 its reverse (63403502), we get a palindrome (83933938).

The spelling of 20530436 in words is "twenty million, five hundred thirty thousand, four hundred thirty-six".