18757441 has 2 divisors, whose sum is σ = 18757442. Its totient is φ = 18757440.

The previous prime is 18757429. The next prime is 18757447. The reversal of 18757441 is 14475781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11029041 + 7728400 = 3321^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 18757441 - 2⁹ = 18756929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18757441.

It is not a weakly prime, because it can be changed into another prime (18757447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9378720 + 9378721.

It is an arithmetic number, because the mean of its divisors is an integer number (9378721).

Almost surely, 2^18757441 is an apocalyptic number.

It is an amenable number.

18757441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18757441 is an equidigital number, since it uses as much as digits as its factorization.

18757441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 37.

The square root of 18757441 is about 4330.9861463644. The cubic root of 18757441 is about 265.6997809474.

It can be divided in two parts, 1875 and 7441, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 18757441 in words is "eighteen million, seven hundred fifty-seven thousand, four hundred forty-one".