18281486953 has 2 divisors, whose sum is σ = 18281486954. Its totient is φ = 18281486952.

The previous prime is 18281486947. The next prime is 18281486969. The reversal of 18281486953 is 35968418281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10417876624 + 7863610329 = 102068^2 + 88677^2 .

It is a cyclic number.

It is not a de Polignac number, because 18281486953 - 2²¹ = 18279389801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18281486894 and 18281486903.

It is not a weakly prime, because it can be changed into another prime (18281486983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9140743476 + 9140743477.

It is an arithmetic number, because the mean of its divisors is an integer number (9140743477).

Almost surely, 2^18281486953 is an apocalyptic number.

It is an amenable number.

18281486953 is a deficient number, since it is larger than the sum of its proper divisors (1).

18281486953 is an equidigital number, since it uses as much as digits as its factorization.

18281486953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 55.

The spelling of 18281486953 in words is "eighteen billion, two hundred eighty-one million, four hundred eighty-six thousand, nine hundred fifty-three".