18140043800 has 48 divisors (see below), whose sum is σ = 44656527960. Its totient is φ = 6829191680.

The previous prime is 18140043791. The next prime is 18140043809. The reversal of 18140043800 is 834004181.

It is an interprime number because it is at equal distance from previous prime (18140043791) and next prime (18140043809).

It is a super-2 number, since 2×18140043800² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18140043809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2664254 + ... + 2671053.

Almost surely, 2^18140043800 is an apocalyptic number.

18140043800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18140043800 is an abundant number, since it is smaller than the sum of its proper divisors (26516484160).

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

18140043800 is a wasteful number, since it uses less digits than its factorization.

18140043800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5335340 (or 5335331 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

Adding to 18140043800 its reverse (834004181), we get a palindrome (18974047981).

The spelling of 18140043800 in words is "eighteen billion, one hundred forty million, forty-three thousand, eight hundred".