101018181820 has 24 divisors (see below), whose sum is σ = 219453292800. Its totient is φ = 39013918272.

The previous prime is 101018181811. The next prime is 101018181833. The reversal of 101018181820 is 28181810101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87084060 + ... + 87085219.

It is an arithmetic number, because the mean of its divisors is an integer number (9143887200).

Almost surely, 2^101018181820 is an apocalyptic number.

101018181820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101018181820 is an abundant number, since it is smaller than the sum of its proper divisors (118435110980).

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

101018181820 is a wasteful number, since it uses less digits than its factorization.

101018181820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174169317 (or 174169315 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 31.

Adding to 101018181820 its reverse (28181810101), we get a palindrome (129199991921).

The spelling of 101018181820 in words is "one hundred one billion, eighteen million, one hundred eighty-one thousand, eight hundred twenty".