20573532 has 108 divisors (see below), whose sum is σ = 61621560. Its totient is φ = 5769792.

The previous prime is 20573521. The next prime is 20573533. The reversal of 20573532 is 23537502.

It is a junction number, because it is equal to n+sod(n) for n = 20573496 and 20573505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573533) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188694 + ... + 188802.

It is an arithmetic number, because the mean of its divisors is an integer number (570570).

Almost surely, 2^20573532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20573532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30810780).

20573532 is an abundant number, since it is smaller than the sum of its proper divisors (41048028).

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

20573532 is a wasteful number, since it uses less digits than its factorization.

20573532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 20573532 is about 4535.8055513878. The cubic root of 20573532 is about 274.0120228443.

It can be divided in two parts, 205 and 73532, that added together give a palindrome (73737).

The spelling of 20573532 in words is "twenty million, five hundred seventy-three thousand, five hundred thirty-two".