20533420366 has 32 divisors (see below), whose sum is σ = 31511934720. Its totient is φ = 10031770944.

The previous prime is 20533420357. The next prime is 20533420423. The reversal of 20533420366 is 66302433502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19315951 + ... + 19317013.

It is an arithmetic number, because the mean of its divisors is an integer number (984747960).

Almost surely, 2^20533420366 is an apocalyptic number.

20533420366 is a deficient number, since it is larger than the sum of its proper divisors (10978514354).

20533420366 is a wasteful number, since it uses less digits than its factorization.

20533420366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 20533420366 its reverse (66302433502), we get a palindrome (86835853868).

The spelling of 20533420366 in words is "twenty billion, five hundred thirty-three million, four hundred twenty thousand, three hundred sixty-six".