23642641 has 4 divisors (see below), whose sum is σ = 25791984. Its totient is φ = 21493300.

The previous prime is 23642639. The next prime is 23642653. The reversal of 23642641 is 14624632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23642641 - 2¹ = 23642639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23642621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074655 + ... + 1074676.

It is an arithmetic number, because the mean of its divisors is an integer number (6447996).

Almost surely, 2^23642641 is an apocalyptic number.

It is an amenable number.

23642641 is a deficient number, since it is larger than the sum of its proper divisors (2149343).

23642641 is a wasteful number, since it uses less digits than its factorization.

23642641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149342.

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

The square root of 23642641 is about 4862.3698954317. The cubic root of 23642641 is about 287.0110797926.

Subtracting from 23642641 its reverse (14624632), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 2364 and 2641, that added together give a palindrome (5005).

The spelling of 23642641 in words is "twenty-three million, six hundred forty-two thousand, six hundred forty-one".