2002155012 has 144 divisors (see below), whose sum is σ = 6151279680. Its totient is φ = 540691200.

The previous prime is 2002155011. The next prime is 2002155019. The reversal of 2002155012 is 2105512002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2002155011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142587 + ... + 155997.

It is an arithmetic number, because the mean of its divisors is an integer number (42717220).

Almost surely, 2^2002155012 is an apocalyptic number.

2002155012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2002155012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3075639840).

2002155012 is an abundant number, since it is smaller than the sum of its proper divisors (4149124668).

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

2002155012 is a wasteful number, since it uses less digits than its factorization.

2002155012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13474 (or 13469 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2002155012 is about 44745.4468298172. The cubic root of 2002155012 is about 1260.3734116232.

Adding to 2002155012 its reverse (2105512002), we get a palindrome (4107667014).

The spelling of 2002155012 in words is "two billion, two million, one hundred fifty-five thousand, twelve".