2018365840 has 20 divisors (see below), whose sum is σ = 4692700764. Its totient is φ = 807346304.

The previous prime is 2018365813. The next prime is 2018365859. The reversal of 2018365840 is 485638102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 883753984 + 1134611856 = 29728^2 + 33684^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2018365840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12614707 + ... + 12614866.

Almost surely, 2^2018365840 is an apocalyptic number.

2018365840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2018365840 is an abundant number, since it is smaller than the sum of its proper divisors (2674334924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2018365840 is a wasteful number, since it uses less digits than its factorization.

2018365840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25229586 (or 25229580 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 2018365840 is about 44926.2266387908. The cubic root of 2018365840 is about 1263.7658895856.

The spelling of 2018365840 in words is "two billion, eighteen million, three hundred sixty-five thousand, eight hundred forty".