20500452 has 144 divisors (see below), whose sum is σ = 64576512. Its totient is φ = 5559840.

The previous prime is 20500439. The next prime is 20500457. The reversal of 20500452 is 25400502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156427 + ... + 156557.

It is an arithmetic number, because the mean of its divisors is an integer number (448448).

Almost surely, 2^20500452 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 20500452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32288256).

20500452 is an abundant number, since it is smaller than the sum of its proper divisors (44076060).

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

20500452 is a wasteful number, since it uses less digits than its factorization.

20500452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20500452 is about 4527.7424838434. The cubic root of 20500452 is about 273.6871952000.

Adding to 20500452 its reverse (25400502), we get a palindrome (45900954).

The spelling of 20500452 in words is "twenty million, five hundred thousand, four hundred fifty-two".