20253566868 has 24 divisors (see below), whose sum is σ = 47261602080. Its totient is φ = 6750720480.

The previous prime is 20253566843. The next prime is 20253566899. The reversal of 20253566868 is 86866535202.

It is a self number, because there is not a number n which added to its sum of digits gives 20253566868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151803 + ... + 252093.

It is an arithmetic number, because the mean of its divisors is an integer number (1969233420).

Almost surely, 2^20253566868 is an apocalyptic number.

It is an amenable number.

20253566868 is an abundant number, since it is smaller than the sum of its proper divisors (27008035212).

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

20253566868 is a wasteful number, since it uses less digits than its factorization.

20253566868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117127 (or 117125 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 51.

The spelling of 20253566868 in words is "twenty billion, two hundred fifty-three million, five hundred sixty-six thousand, eight hundred sixty-eight".