23509542 has 32 divisors (see below), whose sum is σ = 56074752. Its totient is φ = 6424704.

The previous prime is 23509529. The next prime is 23509559. The reversal of 23509542 is 24590532.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11203 + ... + 13134.

It is an arithmetic number, because the mean of its divisors is an integer number (1752336).

Almost surely, 2^23509542 is an apocalyptic number.

23509542 is an abundant number, since it is smaller than the sum of its proper divisors (32565210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23509542 is a wasteful number, since it uses less digits than its factorization.

23509542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24372.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 23509542 is about 4848.6639396848. The cubic root of 23509542 is about 286.4714785102.

The spelling of 23509542 in words is "twenty-three million, five hundred nine thousand, five hundred forty-two".