2012454251820 has 144 divisors (see below), whose sum is σ = 6449979987360. Its totient is φ = 526528843776.

The previous prime is 2012454251809. The next prime is 2012454251851. The reversal of 2012454251820 is 281524542102.

2012454251820 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 454 + 25 + 182 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3648885 + ... + 4164044.

It is an arithmetic number, because the mean of its divisors is an integer number (44791527690).

Almost surely, 2^{2012454251820} is an apocalyptic number.

2012454251820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012454251820 is an abundant number, since it is smaller than the sum of its proper divisors (4437525735540).

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

2012454251820 is a wasteful number, since it uses less digits than its factorization.

2012454251820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7813006 (or 7812992 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Adding to 2012454251820 its reverse (281524542102), we get a palindrome (2293978793922).

The spelling of 2012454251820 in words is "two trillion, twelve billion, four hundred fifty-four million, two hundred fifty-one thousand, eight hundred twenty".