20280312330 has 64 divisors (see below), whose sum is σ = 50970187008. Its totient is φ = 5154490880.

The previous prime is 20280312293. The next prime is 20280312389. The reversal of 20280312330 is 3321308202.

It is a super-3 number, since 3×20280312330³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20280312330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141592 + ... + 246188.

It is an arithmetic number, because the mean of its divisors is an integer number (796409172).

Almost surely, 2^20280312330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20280312330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25485093504).

20280312330 is an abundant number, since it is smaller than the sum of its proper divisors (30689874678).

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

20280312330 is a wasteful number, since it uses less digits than its factorization.

20280312330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104911.

The product of its (nonzero) digits is 1728, while the sum is 24.

The spelling of 20280312330 in words is "twenty billion, two hundred eighty million, three hundred twelve thousand, three hundred thirty".