20155233366 has 48 divisors (see below), whose sum is σ = 44934374160. Its totient is φ = 6526353600.

The previous prime is 20155233359. The next prime is 20155233379. The reversal of 20155233366 is 66333255102.

It is a self number, because there is not a number n which added to its sum of digits gives 20155233366.

It is a congruent number.

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, 8236 + ... + 200943.

It is an arithmetic number, because the mean of its divisors is an integer number (936132795).

Almost surely, 2^20155233366 is an apocalyptic number.

20155233366 is an abundant number, since it is smaller than the sum of its proper divisors (24779140794).

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

20155233366 is a wasteful number, since it uses less digits than its factorization.

20155233366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209341 (or 209338 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 20155233366 its reverse (66333255102), we get a palindrome (86488488468).

The spelling of 20155233366 in words is "twenty billion, one hundred fifty-five million, two hundred thirty-three thousand, three hundred sixty-six".