18420053 has 2 divisors, whose sum is σ = 18420054. Its totient is φ = 18420052.

The previous prime is 18420047. The next prime is 18420067. The reversal of 18420053 is 35002481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13853284 + 4566769 = 3722^2 + 2137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18420053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18426053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9210026 + 9210027.

It is an arithmetic number, because the mean of its divisors is an integer number (9210027).

Almost surely, 2^18420053 is an apocalyptic number.

It is an amenable number.

18420053 is a deficient number, since it is larger than the sum of its proper divisors (1).

18420053 is an equidigital number, since it uses as much as digits as its factorization.

18420053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18420053 is about 4291.8589212601. The cubic root of 18420053 is about 264.0970956366.

The spelling of 18420053 in words is "eighteen million, four hundred twenty thousand, fifty-three".