18426007440 has 160 divisors (see below), whose sum is σ = 63635927040. Its totient is φ = 4900552704.

The previous prime is 18426007433. The next prime is 18426007451. The reversal of 18426007440 is 4470062481.

18426007440 is a `hidden beast` number, since 1 + 8 + 4 + 2 + 600 + 7 + 4 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18426007395 and 18426007404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 816144 + ... + 838416.

It is an arithmetic number, because the mean of its divisors is an integer number (397724544).

Almost surely, 2^18426007440 is an apocalyptic number.

18426007440 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 18426007440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31817963520).

18426007440 is an abundant number, since it is smaller than the sum of its proper divisors (45209919600).

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

18426007440 is a wasteful number, since it uses less digits than its factorization.

18426007440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22678 (or 22666 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 18426007440 in words is "eighteen billion, four hundred twenty-six million, seven thousand, four hundred forty".