20002276992 has 128 divisors (see below), whose sum is σ = 53866575360. Its totient is φ = 6575680512.

The previous prime is 20002276969. The next prime is 20002277021. The reversal of 20002276992 is 29967220002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 20002276992.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11192323 + ... + 11194109.

It is an arithmetic number, because the mean of its divisors is an integer number (420832620).

Almost surely, 2^20002276992 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 20002276992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26933287680).

20002276992 is an abundant number, since it is smaller than the sum of its proper divisors (33864298368).

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

20002276992 is a wasteful number, since it uses less digits than its factorization.

20002276992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2178 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

Adding to 20002276992 its reverse (29967220002), we get a palindrome (49969496994).

The spelling of 20002276992 in words is "twenty billion, two million, two hundred seventy-six thousand, nine hundred ninety-two".