20328409824 has 24 divisors (see below), whose sum is σ = 53362076040. Its totient is φ = 6776136576.

The previous prime is 20328409799. The next prime is 20328409837. The reversal of 20328409824 is 42890482302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 105877039 + ... + 105877230.

It is an arithmetic number, because the mean of its divisors is an integer number (2223419835).

Almost surely, 2^20328409824 is an apocalyptic number.

20328409824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20328409824 is an abundant number, since it is smaller than the sum of its proper divisors (33033666216).

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

20328409824 is a wasteful number, since it uses less digits than its factorization.

20328409824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211754282 (or 211754274 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 20328409824 in words is "twenty billion, three hundred twenty-eight million, four hundred nine thousand, eight hundred twenty-four".