20384280888 has 192 divisors, whose sum is σ = 54774681600. Its totient is φ = 6313731840.

The previous prime is 20384280887. The next prime is 20384280913. The reversal of 20384280888 is 88808248302.

It is a self number, because there is not a number n which added to its sum of digits gives 20384280888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20384280887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129836106 + ... + 129836262.

It is an arithmetic number, because the mean of its divisors is an integer number (285284800).

Almost surely, 2^20384280888 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 20384280888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27387340800).

20384280888 is an abundant number, since it is smaller than the sum of its proper divisors (34390400712).

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

20384280888 is a wasteful number, since it uses less digits than its factorization.

20384280888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1572864, while the sum is 51.

The spelling of 20384280888 in words is "twenty billion, three hundred eighty-four million, two hundred eighty thousand, eight hundred eighty-eight".