20166083820 has 72 divisors (see below), whose sum is σ = 61202087856. Its totient is φ = 5374841472.

The previous prime is 20166083813. The next prime is 20166083843. The reversal of 20166083820 is 2838066102.

20166083820 is a `hidden beast` number, since 2 + 0 + 16 + 608 + 38 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 332574 + ... + 388506.

It is an arithmetic number, because the mean of its divisors is an integer number (850028998).

Almost surely, 2^20166083820 is an apocalyptic number.

20166083820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20166083820 is an abundant number, since it is smaller than the sum of its proper divisors (41036004036).

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

20166083820 is a wasteful number, since it uses less digits than its factorization.

20166083820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57951 (or 57946 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20166083820 in words is "twenty billion, one hundred sixty-six million, eighty-three thousand, eight hundred twenty".