18815040000 has 600 divisors, whose sum is σ = 69797407680. Its totient is φ = 4875264000.

The previous prime is 18815039993. The next prime is 18815040001. The reversal of 18815040000 is 4051881.

It is a tau number, because it is divible by the number of its divisors (600).

It is not an unprimeable number, because it can be changed into a prime (18815040001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 135359931 + ... + 135360069.

Almost surely, 2^18815040000 is an apocalyptic number.

18815040000 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 18815040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34898703840).

18815040000 is an abundant number, since it is smaller than the sum of its proper divisors (50982367680).

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

18815040000 is an equidigital number, since it uses as much as digits as its factorization.

18815040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

Adding to 18815040000 its reverse (4051881), we get a palindrome (18819091881).

It can be divided in two parts, 188150 and 40000, that added together give a triangular number (228150 = T₆₇₅).

The spelling of 18815040000 in words is "eighteen billion, eight hundred fifteen million, forty thousand".