18882001 has 4 divisors (see below), whose sum is σ = 19191604. Its totient is φ = 18572400.

The previous prime is 18881999. The next prime is 18882013. The reversal of 18882001 is 10028881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2890000 + 15992001 = 1700^2 + 3999^2 .

It is a cyclic number.

It is not a de Polignac number, because 18882001 - 2¹ = 18881999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18882041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154710 + ... + 154831.

It is an arithmetic number, because the mean of its divisors is an integer number (4797901).

Almost surely, 2^18882001 is an apocalyptic number.

It is an amenable number.

18882001 is a deficient number, since it is larger than the sum of its proper divisors (309603).

18882001 is an equidigital number, since it uses as much as digits as its factorization.

18882001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309602.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 18882001 is about 4345.3424491057. The cubic root of 18882001 is about 266.2866160784.

The spelling of 18882001 in words is "eighteen million, eight hundred eighty-two thousand, one".