18067433640 has 256 divisors, whose sum is σ = 59470848000. Its totient is φ = 4374051840.

The previous prime is 18067433627. The next prime is 18067433653. The reversal of 18067433640 is 4633476081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18067433627) and next prime (18067433653).

It is a junction number, because it is equal to n+sod(n) for n = 18067433592 and 18067433601.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7561566 + ... + 7563954.

It is an arithmetic number, because the mean of its divisors is an integer number (232308000).

Almost surely, 2^18067433640 is an apocalyptic number.

18067433640 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 18067433640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29735424000).

18067433640 is an abundant number, since it is smaller than the sum of its proper divisors (41403414360).

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

18067433640 is a wasteful number, since it uses less digits than its factorization.

18067433640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 18067433640 in words is "eighteen billion, sixty-seven million, four hundred thirty-three thousand, six hundred forty".