20627533 has 4 divisors (see below), whose sum is σ = 20831868. Its totient is φ = 20423200.

The previous prime is 20627531. The next prime is 20627539. The reversal of 20627533 is 33572602.

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 16990884 + 3636649 = 4122^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 20627533 - 2¹ = 20627531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20627531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102016 + ... + 102217.

It is an arithmetic number, because the mean of its divisors is an integer number (5207967).

Almost surely, 2^20627533 is an apocalyptic number.

It is an amenable number.

20627533 is a deficient number, since it is larger than the sum of its proper divisors (204335).

20627533 is a wasteful number, since it uses less digits than its factorization.

20627533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204334.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 20627533 is about 4541.7543967062. The cubic root of 20627533 is about 274.2515538409.

The spelling of 20627533 in words is "twenty million, six hundred twenty-seven thousand, five hundred thirty-three".