20320452 has 18 divisors (see below), whose sum is σ = 51365678. Its totient is φ = 6773472.

The previous prime is 20320441. The next prime is 20320453. The reversal of 20320452 is 25402302.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 553536 = 4446^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20320453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282193 + ... + 282264.

Almost surely, 2^20320452 is an apocalyptic number.

It is an amenable number.

20320452 is an abundant number, since it is smaller than the sum of its proper divisors (31045226).

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

20320452 is a wasteful number, since it uses less digits than its factorization.

20320452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564467 (or 564462 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20320452 is about 4507.8212031978. The cubic root of 20320452 is about 272.8838212737.

Adding to 20320452 its reverse (25402302), we get a palindrome (45722754).

The spelling of 20320452 in words is "twenty million, three hundred twenty thousand, four hundred fifty-two".