23236520 has 16 divisors (see below), whose sum is σ = 52282260. Its totient is φ = 9294592.

The previous prime is 23236513. The next prime is 23236537. The reversal of 23236520 is 2563232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22486564 + 749956 = 4742^2 + 866^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290417 + ... + 290496.

Almost surely, 2^23236520 is an apocalyptic number.

23236520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23236520 is an abundant number, since it is smaller than the sum of its proper divisors (29045740).

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

23236520 is a wasteful number, since it uses less digits than its factorization.

23236520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580924 (or 580920 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 23236520 is about 4820.4273669458. The cubic root of 23236520 is about 285.3582035464.

Adding to 23236520 its reverse (2563232), we get a palindrome (25799752).

The spelling of 23236520 in words is "twenty-three million, two hundred thirty-six thousand, five hundred twenty".