20539532 has 24 divisors (see below), whose sum is σ = 40748400. Its totient is φ = 8980416.

The previous prime is 20539531. The next prime is 20539537. The reversal of 20539532 is 23593502.

It is a junction number, because it is equal to n+sod(n) for n = 20539495 and 20539504.

It is not an unprimeable number, because it can be changed into a prime (20539531) 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 7 ways as a sum of consecutive naturals, for example, 9407 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (1697850).

Almost surely, 2^20539532 is an apocalyptic number.

It is an amenable number.

20539532 is a deficient number, since it is larger than the sum of its proper divisors (20208868).

20539532 is a wasteful number, since it uses less digits than its factorization.

20539532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20825 (or 20823 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20539532 is about 4532.0560455493. The cubic root of 20539532 is about 273.8609947236.

The spelling of 20539532 in words is "twenty million, five hundred thirty-nine thousand, five hundred thirty-two".