2123623644 has 24 divisors (see below), whose sum is σ = 4957496208. Its totient is φ = 707535360.

The previous prime is 2123623589. The next prime is 2123623679. The reversal of 2123623644 is 4463263212.

It is a nude number because it is divisible by every one of its digits.

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, 15637 + ... + 67020.

It is an arithmetic number, because the mean of its divisors is an integer number (206562342).

Almost surely, 2^2123623644 is an apocalyptic number.

It is an amenable number.

2123623644 is an abundant number, since it is smaller than the sum of its proper divisors (2833872564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123623644 is a wasteful number, since it uses less digits than its factorization.

2123623644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84805 (or 84803 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 2123623644 is about 46082.7911915066. The cubic root of 2123623644 is about 1285.3631668439.

Adding to 2123623644 its reverse (4463263212), we get a palindrome (6586886856).

The spelling of 2123623644 in words is "two billion, one hundred twenty-three million, six hundred twenty-three thousand, six hundred forty-four".