23136534 has 24 divisors (see below), whose sum is σ = 50302512. Its totient is φ = 7685520.

The previous prime is 23136527. The next prime is 23136559. The reversal of 23136534 is 43563132.

It is a happy number.

23136534 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 653 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 23136498 and 23136507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3532 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (2095938).

Almost surely, 2^23136534 is an apocalyptic number.

23136534 is an abundant number, since it is smaller than the sum of its proper divisors (27165978).

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

23136534 is a wasteful number, since it uses less digits than its factorization.

23136534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452 (or 4449 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 23136534 is about 4810.0451141335. The cubic root of 23136534 is about 284.9483193456.

Adding to 23136534 its reverse (43563132), we get a palindrome (66699666).

The spelling of 23136534 in words is "twenty-three million, one hundred thirty-six thousand, five hundred thirty-four".