18887222050 has 12 divisors (see below), whose sum is σ = 35130233106. Its totient is φ = 7554888800.

The previous prime is 18887222047. The next prime is 18887222069. The reversal of 18887222050 is 5022278881.

It can be written as a sum of positive squares in 3 ways, for example, as 13649949889 + 5237272161 = 116833^2 + 72369^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18887221988 and 18887222006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188872171 + ... + 188872270.

Almost surely, 2^18887222050 is an apocalyptic number.

18887222050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18887222050 is a deficient number, since it is larger than the sum of its proper divisors (16243011056).

18887222050 is a wasteful number, since it uses less digits than its factorization.

18887222050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377744453 (or 377744448 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 43.

The spelling of 18887222050 in words is "eighteen billion, eight hundred eighty-seven million, two hundred twenty-two thousand, fifty".