18447344041 has 9 divisors (see below), whose sum is σ = 21460261341. Its totient is φ = 15811194252.

The previous prime is 18447344033. The next prime is 18447344063. The reversal of 18447344041 is 14044374481.

The square root of 18447344041 is 135821.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18447344041 - 2³ = 18447344033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18447343985 and 18447344003.

It is not an unprimeable number, because it can be changed into a prime (18447344021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 941046 + ... + 960448.

Almost surely, 2^18447344041 is an apocalyptic number.

18447344041 is the 135821-st square number.

18447344041 is the 67911-st centered octagonal number.

It is an amenable number.

18447344041 is a deficient number, since it is larger than the sum of its proper divisors (3012917300).

18447344041 is an frugal number, since it uses more digits than its factorization.

18447344041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38820 (or 19410 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The spelling of 18447344041 in words is "eighteen billion, four hundred forty-seven million, three hundred forty-four thousand, forty-one".