18010394643 has 16 divisors (see below), whose sum is σ = 25453643040. Its totient is φ = 11288549376.

The previous prime is 18010394629. The next prime is 18010394657. The reversal of 18010394643 is 34649301081.

It is an interprime number because it is at equal distance from previous prime (18010394629) and next prime (18010394657).

It is not a de Polignac number, because 18010394643 - 2⁶ = 18010394579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18010394603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140658 + ... + 236231.

It is an arithmetic number, because the mean of its divisors is an integer number (1590852690).

Almost surely, 2^18010394643 is an apocalyptic number.

18010394643 is a deficient number, since it is larger than the sum of its proper divisors (7443248397).

18010394643 is a wasteful number, since it uses less digits than its factorization.

18010394643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377846.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 18010394643 in words is "eighteen billion, ten million, three hundred ninety-four thousand, six hundred forty-three".