20330439920 has 80 divisors (see below), whose sum is σ = 54213547968. Its totient is φ = 6945576960.

The previous prime is 20330439919. The next prime is 20330439953. The reversal of 20330439920 is 2993403302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (35).

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 15 ways as a sum of consecutive naturals, for example, 92762 + ... + 221958.

Almost surely, 2^20330439920 is an apocalyptic number.

20330439920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20330439920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27106773984).

20330439920 is an abundant number, since it is smaller than the sum of its proper divisors (33883108048).

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

20330439920 is a wasteful number, since it uses less digits than its factorization.

20330439920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129498 (or 129492 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 35.

The spelling of 20330439920 in words is "twenty billion, three hundred thirty million, four hundred thirty-nine thousand, nine hundred twenty".