23011542 has 12 divisors (see below), whose sum is σ = 49858380. Its totient is φ = 7670508.

The previous prime is 23011531. The next prime is 23011543. The reversal of 23011542 is 24511032.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1278419 = 23011542 / (2 + 3 + 0 + 1 + 1 + 5 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011543) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 639192 + ... + 639227.

It is an arithmetic number, because the mean of its divisors is an integer number (4154865).

Almost surely, 2^23011542 is an apocalyptic number.

23011542 is an abundant number, since it is smaller than the sum of its proper divisors (26846838).

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

23011542 is a wasteful number, since it uses less digits than its factorization.

23011542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278427 (or 1278424 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 23011542 is about 4797.0347090677. The cubic root of 23011542 is about 284.4342609179.

Adding to 23011542 its reverse (24511032), we get a palindrome (47522574).

The spelling of 23011542 in words is "twenty-three million, eleven thousand, five hundred forty-two".