23103621 has 12 divisors (see below), whose sum is σ = 33697248. Its totient is φ = 15252264.

The previous prime is 23103617. The next prime is 23103643. The reversal of 23103621 is 12630132.

It is not a de Polignac number, because 23103621 - 2² = 23103617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23103594 and 23103603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11535 + ... + 13388.

It is an arithmetic number, because the mean of its divisors is an integer number (2808104).

Almost surely, 2^23103621 is an apocalyptic number.

It is an amenable number.

23103621 is a deficient number, since it is larger than the sum of its proper divisors (10593627).

23103621 is a wasteful number, since it uses less digits than its factorization.

23103621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25032 (or 25029 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 23103621 is about 4806.6226188458. The cubic root of 23103621 is about 284.8131369727.

Adding to 23103621 its reverse (12630132), we get a palindrome (35733753).

The spelling of 23103621 in words is "twenty-three million, one hundred three thousand, six hundred twenty-one".