20452 has 6 divisors (see below), whose sum is σ = 35798. Its totient is φ = 10224.

The previous prime is 20443. The next prime is 20477. The reversal of 20452 is 25402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11236 + 9216 = 106^2 + 96^2 .

It is an unprimeable number.

20452 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553 + ... + 2560.

2²⁰⁴⁵² is an apocalyptic number.

It is an amenable number.

20452 is a deficient number, since it is larger than the sum of its proper divisors (15346).

20452 is a wasteful number, since it uses less digits than its factorization.

20452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117 (or 5115 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20452 is about 143.0104891258. The cubic root of 20452 is about 27.3471408856.

Adding to 20452 its reverse (25402), we get a palindrome (45854).

Subtracting 20452 from its reverse (25402), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 204 and 52, that added together give a 8-th power (256 = 2⁸).

The spelling of 20452 in words is "twenty thousand, four hundred fifty-two".