18415250958 has 96 divisors (see below), whose sum is σ = 40358878560. Its totient is φ = 5598927360.

The previous prime is 18415250957. The next prime is 18415251083. The reversal of 18415250958 is 85905251481.

It is a super-2 number, since 2×18415250958² (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 (18415250951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49370460 + ... + 49370832.

It is an arithmetic number, because the mean of its divisors is an integer number (420404985).

Almost surely, 2^18415250958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18415250958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20179439280).

18415250958 is an abundant number, since it is smaller than the sum of its proper divisors (21943627602).

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

18415250958 is a wasteful number, since it uses less digits than its factorization.

18415250958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 48.

The spelling of 18415250958 in words is "eighteen billion, four hundred fifteen million, two hundred fifty thousand, nine hundred fifty-eight".