20263077888 has 96 divisors (see below), whose sum is σ = 54296424000. Its totient is φ = 6720012288.

The previous prime is 20263077871. The next prime is 20263077889. The reversal of 20263077888 is 88877036202.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 20263077888.

It is not an unprimeable number, because it can be changed into a prime (20263077889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214370 + ... + 1230942.

It is an arithmetic number, because the mean of its divisors is an integer number (565587750).

Almost surely, 2^20263077888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20263077888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27148212000).

20263077888 is an abundant number, since it is smaller than the sum of its proper divisors (34033346112).

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

20263077888 is a wasteful number, since it uses less digits than its factorization.

20263077888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16797 (or 16777 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 20263077888 in words is "twenty billion, two hundred sixty-three million, seventy-seven thousand, eight hundred eighty-eight".