20415252 has 48 divisors (see below), whose sum is σ = 55968192. Its totient is φ = 5710080.

The previous prime is 20415251. The next prime is 20415257. The reversal of 20415252 is 25251402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4233 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (1166004).

Almost surely, 2^20415252 is an apocalyptic number.

20415252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20415252 is an abundant number, since it is smaller than the sum of its proper divisors (35552940).

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

20415252 is a wasteful number, since it uses less digits than its factorization.

20415252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11928 (or 11926 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20415252 is about 4518.3240255652. The cubic root of 20415252 is about 273.3075202010.

Adding to 20415252 its reverse (25251402), we get a palindrome (45666654).

The spelling of 20415252 in words is "twenty million, four hundred fifteen thousand, two hundred fifty-two".