203812143108520 has 16 divisors (see below), whose sum is σ = 458577321994260. Its totient is φ = 81524857243392.

The previous prime is 203812143108487. The next prime is 203812143108521. The reversal of 203812143108520 is 25801341218302.

It can be written as a sum of positive squares in 2 ways, for example, as 203761407348004 + 50735760516 = 14274502^2 + 225246^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5095303577713 = 203812143108520 / (2 + 0 + 3 + 8 + 1 + 2 + 1 + 4 + 3 + 1 + 0 + 8 + 5 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (203812143108521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2547651788817 + ... + 2547651788896.

Almost surely, 2^{203812143108520} is an apocalyptic number.

203812143108520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203812143108520 is an abundant number, since it is smaller than the sum of its proper divisors (254765178885740).

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

203812143108520 is a wasteful number, since it uses less digits than its factorization.

203812143108520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095303577724 (or 5095303577720 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 203812143108520 in words is "two hundred three trillion, eight hundred twelve billion, one hundred forty-three million, one hundred eight thousand, five hundred twenty".