18420353 has 16 divisors (see below), whose sum is σ = 21605760. Its totient is φ = 15379200.

The previous prime is 18420349. The next prime is 18420361. The reversal of 18420353 is 35302481.

It is a cyclic number.

It is not a de Polignac number, because 18420353 - 2² = 18420349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18420373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76313 + ... + 76553.

It is an arithmetic number, because the mean of its divisors is an integer number (1350360).

Almost surely, 2^18420353 is an apocalyptic number.

It is an amenable number.

18420353 is a deficient number, since it is larger than the sum of its proper divisors (3185407).

18420353 is a wasteful number, since it uses less digits than its factorization.

18420353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 18420353 is about 4291.8938710085. The cubic root of 18420353 is about 264.0985293765.

The spelling of 18420353 in words is "eighteen million, four hundred twenty thousand, three hundred fifty-three".