2100440823 has 32 divisors (see below), whose sum is σ = 3248636160. Its totient is φ = 1196052480.

The previous prime is 2100440803. The next prime is 2100440833. The reversal of 2100440823 is 3280440012.

It is not a de Polignac number, because 2100440823 - 2⁶ = 2100440759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100440793 and 2100440802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100440803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098 + ... + 64823.

It is an arithmetic number, because the mean of its divisors is an integer number (101519880).

Almost surely, 2^2100440823 is an apocalyptic number.

2100440823 is a deficient number, since it is larger than the sum of its proper divisors (1148195337).

2100440823 is a wasteful number, since it uses less digits than its factorization.

2100440823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65999.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 2100440823 is about 45830.5664704245. The cubic root of 2100440823 is about 1280.6687632818.

Adding to 2100440823 its reverse (3280440012), we get a palindrome (5380880835).

It can be divided in two parts, 21004408 and 23, that multiplied together give a palindrome (483101384).

The spelling of 2100440823 in words is "two billion, one hundred million, four hundred forty thousand, eight hundred twenty-three".