18411379638 has 64 divisors (see below), whose sum is σ = 37835665920. Its totient is φ = 5970811392.

The previous prime is 18411379631. The next prime is 18411379643. The reversal of 18411379638 is 83697311481.

It is a happy number.

It is a super-2 number, since 2×18411379638² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18411379631) 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 31 ways as a sum of consecutive naturals, for example, 18729295 + ... + 18730277.

It is an arithmetic number, because the mean of its divisors is an integer number (591182280).

Almost surely, 2^18411379638 is an apocalyptic number.

18411379638 is an abundant number, since it is smaller than the sum of its proper divisors (19424286282).

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

18411379638 is a wasteful number, since it uses less digits than its factorization.

18411379638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its digits is 870912, while the sum is 51.

The spelling of 18411379638 in words is "eighteen billion, four hundred eleven million, three hundred seventy-nine thousand, six hundred thirty-eight".