2100803636 has 24 divisors (see below), whose sum is σ = 3763719624. Its totient is φ = 1025740800.

The previous prime is 2100803599. The next prime is 2100803669. The reversal of 2100803636 is 6363080012.

It can be written as a sum of positive squares in 4 ways, for example, as 1163219236 + 937584400 = 34106^2 + 30620^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2100803599 and 2100803608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 65108.

It is an arithmetic number, because the mean of its divisors is an integer number (156821651).

Almost surely, 2^2100803636 is an apocalyptic number.

It is an amenable number.

2100803636 is a deficient number, since it is larger than the sum of its proper divisors (1662915988).

2100803636 is a wasteful number, since it uses less digits than its factorization.

2100803636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71411 (or 71409 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2100803636 is about 45834.5244984608. The cubic root of 2100803636 is about 1280.7424964589.

Adding to 2100803636 its reverse (6363080012), we get a palindrome (8463883648).

The spelling of 2100803636 in words is "two billion, one hundred million, eight hundred three thousand, six hundred thirty-six".