20807532 has 36 divisors (see below), whose sum is σ = 52927056. Its totient is φ = 6892320.

The previous prime is 20807503. The next prime is 20807533. The reversal of 20807532 is 23570802.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 20807496 and 20807505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20807533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4282 + ... + 7742.

It is an arithmetic number, because the mean of its divisors is an integer number (1470196).

Almost surely, 2^20807532 is an apocalyptic number.

It is an amenable number.

20807532 is an abundant number, since it is smaller than the sum of its proper divisors (32119524).

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

20807532 is a wasteful number, since it uses less digits than its factorization.

20807532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3633 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20807532 is about 4561.5273757811. The cubic root of 20807532 is about 275.0469649815.

The spelling of 20807532 in words is "twenty million, eight hundred seven thousand, five hundred thirty-two".