15318000000 has 672 divisors, whose sum is σ = 59047681680. Its totient is φ = 3801600000.

The previous prime is 15317999993. The next prime is 15318000007. The reversal of 15318000000 is 81351.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15317999993) and next prime (15318000007).

It is a super-2 number, since 2×15318000000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15318000007) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 413999982 + ... + 414000018.

Almost surely, 2^15318000000 is an apocalyptic number.

15318000000 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 15318000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29523840840).

15318000000 is an abundant number, since it is smaller than the sum of its proper divisors (43729681680).

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

15318000000 is an frugal number, since it uses more digits than its factorization.

15318000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 15318000000 its reverse (81351), we get a palindrome (15318081351).

The spelling of 15318000000 in words is "fifteen billion, three hundred eighteen million", and thus it is an aban number.