18420153 has 4 divisors (see below), whose sum is σ = 24560208. Its totient is φ = 12280100.

The previous prime is 18420151. The next prime is 18420161. The reversal of 18420153 is 35102481.

18420153 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18420153 - 2¹ = 18420151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18420151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3070023 + ... + 3070028.

It is an arithmetic number, because the mean of its divisors is an integer number (6140052).

Almost surely, 2^18420153 is an apocalyptic number.

It is an amenable number.

18420153 is a deficient number, since it is larger than the sum of its proper divisors (6140055).

18420153 is an equidigital number, since it uses as much as digits as its factorization.

18420153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140054.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18420153 is about 4291.8705712079. The cubic root of 18420153 is about 264.0975735516.

The spelling of 18420153 in words is "eighteen million, four hundred twenty thousand, one hundred fifty-three".