2103689956 has 81 divisors (see below), whose sum is σ = 4186365897. Its totient is φ = 924658560.

The previous prime is 2103689933. The next prime is 2103689971. The reversal of 2103689956 is 6599863012.

The square root of 2103689956 is 45866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1637820900 + 465869056 = 40470^2 + 21584^2 .

It is a super-2 number, since 2×2103689956² = 8851022861950563872, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 29629401 + ... + 29629471.

Almost surely, 2^2103689956 is an apocalyptic number.

2103689956 is the 45866-th square number.

It is an amenable number.

2103689956 is a deficient number, since it is larger than the sum of its proper divisors (2082675941).

2103689956 is a wasteful number, since it uses less digits than its factorization.

2103689956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The cubic root of 2103689956 is about 1281.3287706764.

Multiplying 2103689956 by its sum of digits (49), we get a square (103080807844 = 321062²).

The spelling of 2103689956 in words is "two billion, one hundred three million, six hundred eighty-nine thousand, nine hundred fifty-six".