188263100820 has 96 divisors (see below), whose sum is σ = 533109709440. Its totient is φ = 49636823040.

The previous prime is 188263100813. The next prime is 188263100863. The reversal of 188263100820 is 28001362881.

It is a super-2 number, since 2×188263100820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2739075 + ... + 2806965.

It is an arithmetic number, because the mean of its divisors is an integer number (5553226140).

Almost surely, 2^188263100820 is an apocalyptic number.

188263100820 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 188263100820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266554854720).

188263100820 is an abundant number, since it is smaller than the sum of its proper divisors (344846608620).

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

188263100820 is a wasteful number, since it uses less digits than its factorization.

188263100820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68425 (or 68423 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 188263100820 in words is "one hundred eighty-eight billion, two hundred sixty-three million, one hundred thousand, eight hundred twenty".