20564252248 has 16 divisors (see below), whose sum is σ = 39498411960. Its totient is φ = 10031342400.

The previous prime is 20564252239. The next prime is 20564252257. The reversal of 20564252248 is 84225246502.

It is an interprime number because it is at equal distance from previous prime (20564252239) and next prime (20564252257).

It is a self number, because there is not a number n which added to its sum of digits gives 20564252248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31347618 + ... + 31348273.

Almost surely, 2^20564252248 is an apocalyptic number.

It is an amenable number.

20564252248 is a deficient number, since it is larger than the sum of its proper divisors (18934159712).

20564252248 is a wasteful number, since it uses less digits than its factorization.

20564252248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62695938 (or 62695934 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 40.

The spelling of 20564252248 in words is "twenty billion, five hundred sixty-four million, two hundred fifty-two thousand, two hundred forty-eight".