15823471820 has 96 divisors (see below), whose sum is σ = 38259381888. Its totient is φ = 5445292032.

The previous prime is 15823471801. The next prime is 15823471823. The reversal of 15823471820 is 2817432851.

15823471820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15823471820² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15823471823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437882 + ... + 472638.

It is an arithmetic number, because the mean of its divisors is an integer number (398535228).

Almost surely, 2^15823471820 is an apocalyptic number.

15823471820 is a gapful number since it is divisible by the number (10) 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 15823471820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19129690944).

15823471820 is an abundant number, since it is smaller than the sum of its proper divisors (22435910068).

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

15823471820 is a wasteful number, since it uses less digits than its factorization.

15823471820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34899 (or 34897 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 15823471820 in words is "fifteen billion, eight hundred twenty-three million, four hundred seventy-one thousand, eight hundred twenty".