20280652 has 12 divisors (see below), whose sum is σ = 40561360. Its totient is φ = 8691696.

The previous prime is 20280607. The next prime is 20280661. The reversal of 20280652 is 25608202.

20280652 is an admirable number.

It is a super-2 number, since 2×20280652² = 822609691090208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362127 + ... + 362182.

Almost surely, 2^20280652 is an apocalyptic number.

It is an amenable number.

20280652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20280652 is a wasteful number, since it uses less digits than its factorization.

20280652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724320 (or 724318 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20280652 is about 4503.4044899387. The cubic root of 20280652 is about 272.7055464578.

Adding to 20280652 its reverse (25608202), we get a palindrome (45888854).

The spelling of 20280652 in words is "twenty million, two hundred eighty thousand, six hundred fifty-two".