118400018100 has 432 divisors, whose sum is σ = 451755460800. Its totient is φ = 23665582080.

The previous prime is 118400018059. The next prime is 118400018101. The reversal of 118400018100 is 1810004811.

It is a super-2 number, since 2×118400018100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118400018101) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3614596 + ... + 3647204.

Almost surely, 2^118400018100 is an apocalyptic number.

118400018100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118400018100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225877730400).

118400018100 is an abundant number, since it is smaller than the sum of its proper divisors (333355442700).

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

118400018100 is a wasteful number, since it uses less digits than its factorization.

118400018100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32672 (or 32658 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 24.

The spelling of 118400018100 in words is "one hundred eighteen billion, four hundred million, eighteen thousand, one hundred".