20252644 has 12 divisors (see below), whose sum is σ = 37527084. Its totient is φ = 9530624.

The previous prime is 20252611. The next prime is 20252663. The reversal of 20252644 is 44625202.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 14062500 = 2488^2 + 3750^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148849 + ... + 148984.

It is an arithmetic number, because the mean of its divisors is an integer number (3127257).

Almost surely, 2^20252644 is an apocalyptic number.

It is an amenable number.

20252644 is a deficient number, since it is larger than the sum of its proper divisors (17274440).

20252644 is a wasteful number, since it uses less digits than its factorization.

20252644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297854 (or 297852 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20252644 is about 4500.2937681889. The cubic root of 20252644 is about 272.5799512897.

Adding to 20252644 its reverse (44625202), we get a palindrome (64877846).

The spelling of 20252644 in words is "twenty million, two hundred fifty-two thousand, six hundred forty-four".