15818130042 has 64 divisors (see below), whose sum is σ = 37198756224. Its totient is φ = 4420880640.

The previous prime is 15818130001. The next prime is 15818130043. The reversal of 15818130042 is 24003181851.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 15818129985 and 15818130012.

It is not an unprimeable number, because it can be changed into a prime (15818130043) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1088448 + ... + 1102884.

It is an arithmetic number, because the mean of its divisors is an integer number (581230566).

Almost surely, 2^15818130042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15818130042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18599378112).

15818130042 is an abundant number, since it is smaller than the sum of its proper divisors (21380626182).

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

15818130042 is a wasteful number, since it uses less digits than its factorization.

15818130042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15743.

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 15818130042 in words is "fifteen billion, eight hundred eighteen million, one hundred thirty thousand, forty-two".