20043529 has 15 divisors (see below), whose sum is σ = 22659735. Its totient is φ = 17728920.

The previous prime is 20043469. The next prime is 20043559. The reversal of 20043529 is 92534002.

It is a happy number.

The square root of 20043529 is 4477.

It is a perfect power (a square), and thus also a powerful number.

20043529 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 17935225 + 2108304 = 4235^2 + 1452^2 .

It is not a de Polignac number, because 20043529 - 2¹¹ = 20041481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20043559) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 541699 + ... + 541735.

It is an arithmetic number, because the mean of its divisors is an integer number (1510649).

Almost surely, 2^20043529 is an apocalyptic number.

20043529 is the 4477-th square number.

20043529 is the 2239-th centered octagonal number.

It is an amenable number.

20043529 is a deficient number, since it is larger than the sum of its proper divisors (2616206).

20043529 is an frugal number, since it uses more digits than its factorization.

20043529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The cubic root of 20043529 is about 271.6385454392.

Multiplying 20043529 by its sum of digits (25), we get a square (501088225 = 22385²).

The spelling of 20043529 in words is "twenty million, forty-three thousand, five hundred twenty-nine".