2018261520 has 120 divisors (see below), whose sum is σ = 7394205312. Its totient is φ = 489273600.

The previous prime is 2018261507. The next prime is 2018261527. The reversal of 2018261520 is 251628102.

It is a happy number.

2018261520 is a `hidden beast` number, since 2 + 0 + 1 + 82 + 61 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×2018261520² = 8146759126225420800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2018261527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119496 + ... + 135335.

Almost surely, 2^2018261520 is an apocalyptic number.

2018261520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2018261520 is an abundant number, since it is smaller than the sum of its proper divisors (5375943792).

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

2018261520 is a wasteful number, since it uses less digits than its factorization.

2018261520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254861 (or 254852 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2018261520 is about 44925.0656093010. The cubic root of 2018261520 is about 1263.7441164715.

Adding to 2018261520 its reverse (251628102), we get a palindrome (2269889622).

The spelling of 2018261520 in words is "two billion, eighteen million, two hundred sixty-one thousand, five hundred twenty".