18197104044 has 48 divisors (see below), whose sum is σ = 48558664448. Its totient is φ = 5195631168.

The previous prime is 18197104019. The next prime is 18197104091. The reversal of 18197104044 is 44040179181.

It is a super-2 number, since 2×18197104044² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18197103993 and 18197104011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51534 + ... + 197610.

Almost surely, 2^18197104044 is an apocalyptic number.

18197104044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18197104044 is an abundant number, since it is smaller than the sum of its proper divisors (30361560404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18197104044 is a wasteful number, since it uses less digits than its factorization.

18197104044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147574 (or 147572 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 18197104044 in words is "eighteen billion, one hundred ninety-seven million, one hundred four thousand, forty-four".