20538532 has 12 divisors (see below), whose sum is σ = 41077120. Its totient is φ = 8802216.

The previous prime is 20538527. The next prime is 20538559. The reversal of 20538532 is 23583502.

20538532 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 733519 = 20538532 / (2 + 0 + 5 + 3 + 8 + 5 + 3 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 20538532.

It is an unprimeable number.

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, 366732 + ... + 366787.

Almost surely, 2^20538532 is an apocalyptic number.

It is an amenable number.

20538532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20538532 is a wasteful number, since it uses less digits than its factorization.

20538532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733530 (or 733528 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20538532 is about 4531.9457190041. The cubic root of 20538532 is about 273.8565501979.

It can be divided in two parts, 2053 and 8532, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 20538532 in words is "twenty million, five hundred thirty-eight thousand, five hundred thirty-two".