18430221050 has 24 divisors (see below), whose sum is σ = 36296695836. Its totient is φ = 6938435840.

The previous prime is 18430221049. The next prime is 18430221053. The reversal of 18430221050 is 5012203481.

It can be written as a sum of positive squares in 6 ways, for example, as 6518463169 + 11911757881 = 80737^2 + 109141^2 .

It is not an unprimeable number, because it can be changed into a prime (18430221053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10840457 + ... + 10842156.

Almost surely, 2^18430221050 is an apocalyptic number.

18430221050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18430221050 is a deficient number, since it is larger than the sum of its proper divisors (17866474786).

18430221050 is a wasteful number, since it uses less digits than its factorization.

18430221050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21682642 (or 21682637 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 18430221050 in words is "eighteen billion, four hundred thirty million, two hundred twenty-one thousand, fifty".