18436959790 has 32 divisors (see below), whose sum is σ = 33680235456. Its totient is φ = 7265233920.

The previous prime is 18436959767. The next prime is 18436959791. The reversal of 18436959790 is 9795963481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18436959791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965374 + ... + 984286.

It is an arithmetic number, because the mean of its divisors is an integer number (1052507358).

Almost surely, 2^18436959790 is an apocalyptic number.

18436959790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18436959790 is a deficient number, since it is larger than the sum of its proper divisors (15243275666).

18436959790 is a wasteful number, since it uses less digits than its factorization.

18436959790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364.

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 18436959790 in words is "eighteen billion, four hundred thirty-six million, nine hundred fifty-nine thousand, seven hundred ninety".