2103206787 has 24 divisors (see below), whose sum is σ = 3332482608. Its totient is φ = 1267617600.

The previous prime is 2103206783. The next prime is 2103206797. The reversal of 2103206787 is 7876023012.

It is not a de Polignac number, because 2103206787 - 2² = 2103206783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2103206783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40768 + ... + 76605.

It is an arithmetic number, because the mean of its divisors is an integer number (138853442).

Almost surely, 2^2103206787 is an apocalyptic number.

2103206787 is a deficient number, since it is larger than the sum of its proper divisors (1229275821).

2103206787 is a wasteful number, since it uses less digits than its factorization.

2103206787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117571 (or 117568 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2103206787 is about 45860.7325170456. The cubic root of 2103206787 is about 1281.2306659561.

Adding to 2103206787 its reverse (7876023012), we get a palindrome (9979229799).

The spelling of 2103206787 in words is "two billion, one hundred three million, two hundred six thousand, seven hundred eighty-seven".