18246358938 has 16 divisors (see below), whose sum is σ = 36494067456. Its totient is φ = 6081894720.

The previous prime is 18246358937. The next prime is 18246358957. The reversal of 18246358938 is 83985364281.

It is a super-2 number, since 2×18246358938² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18246358931) 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 7 ways as a sum of consecutive naturals, for example, 237783 + ... + 305013.

It is an arithmetic number, because the mean of its divisors is an integer number (2280879216).

Almost surely, 2^18246358938 is an apocalyptic number.

18246358938 is an abundant number, since it is smaller than the sum of its proper divisors (18247708518).

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

18246358938 is a wasteful number, since it uses less digits than its factorization.

18246358938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112469.

The product of its digits is 9953280, while the sum is 57.

The spelling of 18246358938 in words is "eighteen billion, two hundred forty-six million, three hundred fifty-eight thousand, nine hundred thirty-eight".