18003739026 has 256 divisors, whose sum is σ = 48120791040. Its totient is φ = 4361195520.

The previous prime is 18003738997. The next prime is 18003739027. The reversal of 18003739026 is 62093730081.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18003739027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 37585855 + ... + 37586333.

It is an arithmetic number, because the mean of its divisors is an integer number (187971840).

Almost surely, 2^18003739026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18003739026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24060395520).

18003739026 is an abundant number, since it is smaller than the sum of its proper divisors (30117052014).

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

18003739026 is a wasteful number, since it uses less digits than its factorization.

18003739026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 18003739026 in words is "eighteen billion, three million, seven hundred thirty-nine thousand, twenty-six".