20820333786 has 64 divisors (see below), whose sum is σ = 47990154240. Its totient is φ = 5898672000.

The previous prime is 20820333757. The next prime is 20820333797. The reversal of 20820333786 is 68733302802.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6402661 + ... + 6405911.

It is an arithmetic number, because the mean of its divisors is an integer number (749846160).

Almost surely, 2^20820333786 is an apocalyptic number.

20820333786 is an abundant number, since it is smaller than the sum of its proper divisors (27169820454).

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

20820333786 is a wasteful number, since it uses less digits than its factorization.

20820333786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20820333786 in words is "twenty billion, eight hundred twenty million, three hundred thirty-three thousand, seven hundred eighty-six".