1018008100 has 72 divisors (see below), whose sum is σ = 2262933288. Its totient is φ = 397363200.

The previous prime is 1018008091. The next prime is 1018008107. The reversal of 1018008100 is 18008101.

It can be written as a sum of positive squares in 12 ways, for example, as 86415616 + 931592484 = 9296^2 + 30522^2 .

It is a super-2 number, since 2×1018008100² = 2072680983331220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1018008107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1276902 + ... + 1277698.

It is an arithmetic number, because the mean of its divisors is an integer number (31429629).

Almost surely, 2^1018008100 is an apocalyptic number.

1018008100 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 1018008100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131466644).

1018008100 is an abundant number, since it is smaller than the sum of its proper divisors (1244925188).

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

1018008100 is a wasteful number, since it uses less digits than its factorization.

1018008100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1098 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 1018008100 is about 31906.2392017612. The cubic root of 1018008100 is about 1005.9670238075.

Subtracting from 1018008100 its reverse (18008101), we obtain a palindrome (999999999).

The spelling of 1018008100 in words is "one billion, eighteen million, eight thousand, one hundred".