8182021900 has 36 divisors (see below), whose sum is σ = 19120758832. Its totient is φ = 3021053760.

The previous prime is 8182021867. The next prime is 8182021907. The reversal of 8182021900 is 91202818.

It is a happy number.

It is a super-2 number, since 2×8182021900² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8182021907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3145632 + ... + 3148231.

Almost surely, 2^8182021900 is an apocalyptic number.

It is an amenable number.

8182021900 is an abundant number, since it is smaller than the sum of its proper divisors (10938736932).

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

8182021900 is a wasteful number, since it uses less digits than its factorization.

8182021900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293890 (or 6293883 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 8182021900 is about 90454.5294609397. The cubic root of 8182021900 is about 2015.0548825736.

The spelling of 8182021900 in words is "eight billion, one hundred eighty-two million, twenty-one thousand, nine hundred".