18441911600 has 120 divisors (see below), whose sum is σ = 51158996448. Its totient is φ = 6257664000.

The previous prime is 18441911599. The next prime is 18441911603. The reversal of 18441911600 is 611914481.

It is a Cunningham number, because it is equal to 135801²-1.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (18441911603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237650 + ... + 305550.

Almost surely, 2^18441911600 is an apocalyptic number.

18441911600 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 18441911600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25579498224).

18441911600 is an abundant number, since it is smaller than the sum of its proper divisors (32717084848).

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

18441911600 is a wasteful number, since it uses less digits than its factorization.

18441911600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68023 (or 68012 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18441911600 in words is "eighteen billion, four hundred forty-one million, nine hundred eleven thousand, six hundred".