2106440623 has 16 divisors (see below), whose sum is σ = 2458232640. Its totient is φ = 1767730176.

The previous prime is 2106440621. The next prime is 2106440657. The reversal of 2106440623 is 3260446012.

It is a cyclic number.

It is not a de Polignac number, because 2106440623 - 2¹ = 2106440621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2106440591 and 2106440600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106440621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54963 + ... + 85051.

It is an arithmetic number, because the mean of its divisors is an integer number (153639540).

Almost surely, 2^2106440623 is an apocalyptic number.

2106440623 is a deficient number, since it is larger than the sum of its proper divisors (351792017).

2106440623 is a wasteful number, since it uses less digits than its factorization.

2106440623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30306.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 2106440623 is about 45895.9761090229. The cubic root of 2106440623 is about 1281.8869919930.

Adding to 2106440623 its reverse (3260446012), we get a palindrome (5366886635).

The spelling of 2106440623 in words is "two billion, one hundred six million, four hundred forty thousand, six hundred twenty-three".