18420883 has 8 divisors (see below), whose sum is σ = 19984608. Its totient is φ = 16878144.

The previous prime is 18420881. The next prime is 18420889. The reversal of 18420883 is 38802481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18420883 - 2¹ = 18420881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18420881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3391 + ... + 6952.

It is an arithmetic number, because the mean of its divisors is an integer number (2498076).

Almost surely, 2^18420883 is an apocalyptic number.

18420883 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18420883 is a deficient number, since it is larger than the sum of its proper divisors (1563725).

18420883 is a wasteful number, since it uses less digits than its factorization.

18420883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10493.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 18420883 is about 4291.9556148684. The cubic root of 18420883 is about 264.1010622791.

The spelling of 18420883 in words is "eighteen million, four hundred twenty thousand, eight hundred eighty-three".