18251423028608 has 1152 divisors, whose sum is σ = 50942174976000. Its totient is φ = 6498135705600.

The previous prime is 18251423028541. The next prime is 18251423028653. The reversal of 18251423028608 is 80682032415281.

It is a super-2 number, since 2×18251423028608² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 143 ways as a sum of consecutive naturals, for example, 59450889191 + ... + 59450889497.

It is an arithmetic number, because the mean of its divisors is an integer number (44220638000).

Almost surely, 2^{18251423028608} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18251423028608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25471087488000).

18251423028608 is an abundant number, since it is smaller than the sum of its proper divisors (32690751947392).

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

18251423028608 is a wasteful number, since it uses less digits than its factorization.

18251423028608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 18251423028608 in words is "eighteen trillion, two hundred fifty-one billion, four hundred twenty-three million, twenty-eight thousand, six hundred eight".