18143957050 has 24 divisors (see below), whose sum is σ = 33869619036. Its totient is φ = 7231376640.

The previous prime is 18143957023. The next prime is 18143957057. The reversal of 18143957050 is 5075934181.

It can be written as a sum of positive squares in 6 ways, for example, as 5854239169 + 12289717881 = 76513^2 + 110859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18143956988 and 18143957006.

It is not an unprimeable number, because it can be changed into a prime (18143957057) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 641167 + ... + 668866.

Almost surely, 2^18143957050 is an apocalyptic number.

18143957050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18143957050 is a deficient number, since it is larger than the sum of its proper divisors (15725661986).

18143957050 is a wasteful number, since it uses less digits than its factorization.

18143957050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310322 (or 1310317 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 18143957050 in words is "eighteen billion, one hundred forty-three million, nine hundred fifty-seven thousand, fifty".