18421353 has 12 divisors (see below), whose sum is σ = 28174068. Its totient is φ = 11558400.

The previous prime is 18421349. The next prime is 18421357. The reversal of 18421353 is 35312481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18421349) and next prime (18421357).

It can be written as a sum of positive squares in 2 ways, for example, as 6290064 + 12131289 = 2508^2 + 3483^2 .

It is not a de Polignac number, because 18421353 - 2² = 18421349 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18421357) 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 11 ways as a sum of consecutive naturals, for example, 60048 + ... + 60353.

It is an arithmetic number, because the mean of its divisors is an integer number (2347839).

Almost surely, 2^18421353 is an apocalyptic number.

It is an amenable number.

18421353 is a deficient number, since it is larger than the sum of its proper divisors (9752715).

18421353 is a wasteful number, since it uses less digits than its factorization.

18421353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120424 (or 120421 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 18421353 is about 4292.0103681142. The cubic root of 18421353 is about 264.1033083973.

The spelling of 18421353 in words is "eighteen million, four hundred twenty-one thousand, three hundred fifty-three".