18444084481 has 9 divisors (see below), whose sum is σ = 18732719649. Its totient is φ = 18159836244.

The previous prime is 18444084469. The next prime is 18444084493. The reversal of 18444084481 is 18448044481.

The square root of 18444084481 is 135809.

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

It is an interprime number because it is at equal distance from previous prime (18444084469) and next prime (18444084493).

It is not a de Polignac number, because 18444084481 - 2⁹ = 18444083969 is a prime.

It is a super-2 number, since 2×18444084481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18444084401) 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, 9098190 + ... + 9100216.

Almost surely, 2^18444084481 is an apocalyptic number.

18444084481 is the 135809-th square number.

18444084481 is the 67905-th centered octagonal number.

It is an amenable number.

18444084481 is a deficient number, since it is larger than the sum of its proper divisors (288635168).

18444084481 is an frugal number, since it uses more digits than its factorization.

18444084481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 524288, while the sum is 46.

The spelling of 18444084481 in words is "eighteen billion, four hundred forty-four million, eighty-four thousand, four hundred eighty-one".