10205218818 has 48 divisors (see below), whose sum is σ = 23087166336. Its totient is φ = 3251793600.

The previous prime is 10205218811. The next prime is 10205218883. The reversal of 10205218818 is 81881250201.

It is a super-2 number, since 2×10205218818² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10205218811) 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, 738771 + ... + 752457.

It is an arithmetic number, because the mean of its divisors is an integer number (480982632).

Almost surely, 2^10205218818 is an apocalyptic number.

10205218818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10205218818 is an abundant number, since it is smaller than the sum of its proper divisors (12881947518).

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

10205218818 is a wasteful number, since it uses less digits than its factorization.

10205218818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15519 (or 15516 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The spelling of 10205218818 in words is "ten billion, two hundred five million, two hundred eighteen thousand, eight hundred eighteen".