23011645 has 16 divisors (see below), whose sum is σ = 28782720. Its totient is φ = 17640000.

The previous prime is 23011643. The next prime is 23011649. The reversal of 23011645 is 54611032.

It is not a de Polignac number, because 23011645 - 2¹ = 23011643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011643) 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, 21370 + ... + 22420.

It is an arithmetic number, because the mean of its divisors is an integer number (1798920).

Almost surely, 2^23011645 is an apocalyptic number.

It is an amenable number.

23011645 is a deficient number, since it is larger than the sum of its proper divisors (5771075).

23011645 is a wasteful number, since it uses less digits than its factorization.

23011645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 23011645 is about 4797.0454448546. The cubic root of 23011645 is about 284.4346852946.

Adding to 23011645 its reverse (54611032), we get a palindrome (77622677).

The spelling of 23011645 in words is "twenty-three million, eleven thousand, six hundred forty-five".