23406553 has 4 divisors (see below), whose sum is σ = 23546880. Its totient is φ = 23266228.

The previous prime is 23406547. The next prime is 23406557. The reversal of 23406553 is 35560432.

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 23406553 - 2⁵ = 23406521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23406557) 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, 69913 + ... + 70246.

It is an arithmetic number, because the mean of its divisors is an integer number (5886720).

Almost surely, 2^23406553 is an apocalyptic number.

It is an amenable number.

23406553 is a deficient number, since it is larger than the sum of its proper divisors (140327).

23406553 is a wasteful number, since it uses less digits than its factorization.

23406553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140326.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 23406553 is about 4838.0319345784. The cubic root of 23406553 is about 286.0525479268.

Adding to 23406553 its reverse (35560432), we get a palindrome (58966985).

The spelling of 23406553 in words is "twenty-three million, four hundred six thousand, five hundred fifty-three".