18198611390 has 16 divisors (see below), whose sum is σ = 32765029632. Its totient is φ = 7277771424.

The previous prime is 18198611381. The next prime is 18198611393. The reversal of 18198611390 is 9311689181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198611393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162974 + ... + 250913.

It is an arithmetic number, because the mean of its divisors is an integer number (2047814352).

Almost surely, 2^18198611390 is an apocalyptic number.

18198611390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18198611390 is a deficient number, since it is larger than the sum of its proper divisors (14566418242).

18198611390 is a wasteful number, since it uses less digits than its factorization.

18198611390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418291.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 18198611390 in words is "eighteen billion, one hundred ninety-eight million, six hundred eleven thousand, three hundred ninety".