20015252 has 6 divisors (see below), whose sum is σ = 35026698. Its totient is φ = 10007624.

The previous prime is 20015251. The next prime is 20015293. The reversal of 20015252 is 25251002.

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 3254416 = 4094^2 + 1804^2 .

It is a super-2 number, since 2×20015252² = 801220625247008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20015252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20015251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501903 + ... + 2501910.

It is an arithmetic number, because the mean of its divisors is an integer number (5837783).

Almost surely, 2^20015252 is an apocalyptic number.

It is an amenable number.

20015252 is a deficient number, since it is larger than the sum of its proper divisors (15011446).

20015252 is a wasteful number, since it uses less digits than its factorization.

20015252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003817 (or 5003815 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20015252 is about 4473.8408554619. The cubic root of 20015252 is about 271.5107446228.

Adding to 20015252 its reverse (25251002), we get a palindrome (45266254).

The spelling of 20015252 in words is "twenty million, fifteen thousand, two hundred fifty-two".