20143520228 has 12 divisors (see below), whose sum is σ = 37962788220. Its totient is φ = 9297009312.

The previous prime is 20143520219. The next prime is 20143520249. The reversal of 20143520228 is 82202534102.

It can be written as a sum of positive squares in 2 ways, for example, as 13291322944 + 6852197284 = 115288^2 + 82778^2 .

It is a super-2 number, since 2×20143520228² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20143520228.

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 3 ways as a sum of consecutive naturals, for example, 193687643 + ... + 193687746.

It is an arithmetic number, because the mean of its divisors is an integer number (3163565685).

Almost surely, 2^20143520228 is an apocalyptic number.

It is an amenable number.

20143520228 is a deficient number, since it is larger than the sum of its proper divisors (17819267992).

20143520228 is a wasteful number, since it uses less digits than its factorization.

20143520228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387375406 (or 387375404 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 20143520228 in words is "twenty billion, one hundred forty-three million, five hundred twenty thousand, two hundred twenty-eight".