23426557 has 20 divisors (see below), whose sum is σ = 29847456. Its totient is φ = 18233880.

The previous prime is 23426549. The next prime is 23426569. The reversal of 23426557 is 75562432.

It is not a de Polignac number, because 23426557 - 2³ = 23426549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23426537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25968 + ... + 26854.

Almost surely, 2^23426557 is an apocalyptic number.

It is an amenable number.

23426557 is a deficient number, since it is larger than the sum of its proper divisors (6420899).

23426557 is an frugal number, since it uses more digits than its factorization.

23426557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 905 counting only the distinct ones).

The product of its digits is 50400, while the sum is 34.

The square root of 23426557 is about 4840.0988626267. The cubic root of 23426557 is about 286.1340146542.

Adding to 23426557 its reverse (75562432), we get a palindrome (98988989).

The spelling of 23426557 in words is "twenty-three million, four hundred twenty-six thousand, five hundred fifty-seven".