18241836540 has 144 divisors (see below), whose sum is σ = 55559064960. Its totient is φ = 4459536000.

The previous prime is 18241836523. The next prime is 18241836581. The reversal of 18241836540 is 4563814281.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18241836492 and 18241836501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1087215 + ... + 1103865.

It is an arithmetic number, because the mean of its divisors is an integer number (385826840).

Almost surely, 2^18241836540 is an apocalyptic number.

18241836540 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 18241836540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27779532480).

18241836540 is an abundant number, since it is smaller than the sum of its proper divisors (37317228420).

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

18241836540 is a wasteful number, since it uses less digits than its factorization.

18241836540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16744 (or 16711 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 18241836540 in words is "eighteen billion, two hundred forty-one million, eight hundred thirty-six thousand, five hundred forty".