2018888401 has 4 divisors (see below), whose sum is σ = 2018990692. Its totient is φ = 2018786112.

The previous prime is 2018888383. The next prime is 2018888407. The reversal of 2018888401 is 1048888102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1048888102 = 2 ⋅524444051.

It can be written as a sum of positive squares in 2 ways, for example, as 1352474176 + 666414225 = 36776^2 + 25815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2018888401 - 2⁵ = 2018888369 is a prime.

It is a super-3 number, since 3×2018888401³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018888407) 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, 11076 + ... + 64501.

It is an arithmetic number, because the mean of its divisors is an integer number (504747673).

Almost surely, 2^2018888401 is an apocalyptic number.

It is an amenable number.

2018888401 is a deficient number, since it is larger than the sum of its proper divisors (102291).

2018888401 is an equidigital number, since it uses as much as digits as its factorization.

2018888401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102290.

The product of its (nonzero) digits is 32768, while the sum is 40.

The square root of 2018888401 is about 44932.0420301593. The cubic root of 2018888401 is about 1263.8749444407.

The spelling of 2018888401 in words is "two billion, eighteen million, eight hundred eighty-eight thousand, four hundred one".