2051203184820 has 36 divisors (see below), whose sum is σ = 6221982994500. Its totient is φ = 546987515904.

The previous prime is 2051203184813. The next prime is 2051203184839. The reversal of 2051203184820 is 284813021502.

It is a happy number.

2051203184820 is a `hidden beast` number, since 20 + 5 + 120 + 31 + 8 + 482 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 527790626064 + 1523412558756 = 726492^2 + 1234266^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2051203184820² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5697786445 + ... + 5697786804.

Almost surely, 2^{2051203184820} is an apocalyptic number.

2051203184820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051203184820 is an abundant number, since it is smaller than the sum of its proper divisors (4170779809680).

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

2051203184820 is a wasteful number, since it uses less digits than its factorization.

2051203184820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11395573264 (or 11395573259 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 2051203184820 in words is "two trillion, fifty-one billion, two hundred three million, one hundred eighty-four thousand, eight hundred twenty".