18545953 has 2 divisors, whose sum is σ = 18545954. Its totient is φ = 18545952.

The previous prime is 18545941. The next prime is 18545983. The reversal of 18545953 is 35954581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13630864 + 4915089 = 3692^2 + 2217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18545953 is a prime.

It is not a weakly prime, because it can be changed into another prime (18545903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9272976 + 9272977.

It is an arithmetic number, because the mean of its divisors is an integer number (9272977).

Almost surely, 2^18545953 is an apocalyptic number.

It is an amenable number.

18545953 is a deficient number, since it is larger than the sum of its proper divisors (1).

18545953 is an equidigital number, since it uses as much as digits as its factorization.

18545953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 40.

The square root of 18545953 is about 4306.5012481131. The cubic root of 18545953 is about 264.6974261051.

The spelling of 18545953 in words is "eighteen million, five hundred forty-five thousand, nine hundred fifty-three".