18199497043 has 24 divisors (see below), whose sum is σ = 22852370688. Its totient is φ = 14366128896.

The previous prime is 18199497037. The next prime is 18199497053. The reversal of 18199497043 is 34079499181.

It is a de Polignac number, because none of the positive numbers 2^k-18199497043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18199497023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242830 + ... + 308812.

It is an arithmetic number, because the mean of its divisors is an integer number (952182112).

Almost surely, 2^18199497043 is an apocalyptic number.

18199497043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18199497043 is a deficient number, since it is larger than the sum of its proper divisors (4652873645).

18199497043 is a wasteful number, since it uses less digits than its factorization.

18199497043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66443 (or 66436 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 18199497043 in words is "eighteen billion, one hundred ninety-nine million, four hundred ninety-seven thousand, forty-three".