20547532 has 12 divisors (see below), whose sum is σ = 36188320. Its totient is φ = 10208016.

The previous prime is 20547523. The next prime is 20547539. The reversal of 20547532 is 23574502.

It is a self number, because there is not a number n which added to its sum of digits gives 20547532.

It is not an unprimeable number, because it can be changed into a prime (20547539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15732 + ... + 16987.

Almost surely, 2^20547532 is an apocalyptic number.

It is an amenable number.

20547532 is a deficient number, since it is larger than the sum of its proper divisors (15640788).

20547532 is a wasteful number, since it uses less digits than its factorization.

20547532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32880 (or 32878 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20547532 is about 4532.9385612426. The cubic root of 20547532 is about 273.8965457377.

The spelling of 20547532 in words is "twenty million, five hundred forty-seven thousand, five hundred thirty-two".