1838442481 has 2 divisors, whose sum is σ = 1838442482. Its totient is φ = 1838442480.

The previous prime is 1838442467. The next prime is 1838442491. The reversal of 1838442481 is 1842448381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1514766400 + 323676081 = 38920^2 + 17991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838442481 - 2¹¹ = 1838440433 is a prime.

It is a super-2 number, since 2×1838442481² = 6759741511890870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1838442491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919221240 + 919221241.

It is an arithmetic number, because the mean of its divisors is an integer number (919221241).

Almost surely, 2^1838442481 is an apocalyptic number.

It is an amenable number.

1838442481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838442481 is an equidigital number, since it uses as much as digits as its factorization.

1838442481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196608, while the sum is 43.

The square root of 1838442481 is about 42877.0624110374. The cubic root of 1838442481 is about 1225.0392837048.

The spelling of 1838442481 in words is "one billion, eight hundred thirty-eight million, four hundred forty-two thousand, four hundred eighty-one".