18238805826 has 32 divisors (see below), whose sum is σ = 37474280640. Its totient is φ = 5913585216.

The previous prime is 18238805813. The next prime is 18238805927. The reversal of 18238805826 is 62850883281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 929125 + ... + 948551.

It is an arithmetic number, because the mean of its divisors is an integer number (1171071270).

Almost surely, 2^18238805826 is an apocalyptic number.

18238805826 is an abundant number, since it is smaller than the sum of its proper divisors (19235474814).

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

18238805826 is a wasteful number, since it uses less digits than its factorization.

18238805826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23698.

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 18238805826 in words is "eighteen billion, two hundred thirty-eight million, eight hundred five thousand, eight hundred twenty-six".