203320050642 has 20 divisors (see below), whose sum is σ = 455587521246. Its totient is φ = 67773350160.

The previous prime is 203320050601. The next prime is 203320050671. The reversal of 203320050642 is 246050023302.

It can be written as a sum of positive squares in only one way, i.e., 198301886721 + 5018163921 = 445311^2 + 70839^2 .

It is a super-2 number, since 2×203320050642² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 627530859 + ... + 627531182.

Almost surely, 2^203320050642 is an apocalyptic number.

203320050642 is an abundant number, since it is smaller than the sum of its proper divisors (252267470604).

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

203320050642 is a wasteful number, since it uses less digits than its factorization.

203320050642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255062055 (or 1255062046 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 203320050642 its reverse (246050023302), we get a palindrome (449370073944).

The spelling of 203320050642 in words is "two hundred three billion, three hundred twenty million, fifty thousand, six hundred forty-two".