23538505 has 8 divisors (see below), whose sum is σ = 28537992. Its totient is φ = 18636288.

The previous prime is 23538503. The next prime is 23538547. The reversal of 23538505 is 50583532.

It can be written as a sum of positive squares in 4 ways, for example, as 5721664 + 17816841 = 2392^2 + 4221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23538505 - 2¹ = 23538503 is a prime.

It is a super-2 number, since 2×23538505² = 1108122435270050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23538503) 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 7 ways as a sum of consecutive naturals, for example, 23782 + ... + 24751.

It is an arithmetic number, because the mean of its divisors is an integer number (3567249).

Almost surely, 2^23538505 is an apocalyptic number.

It is an amenable number.

23538505 is a deficient number, since it is larger than the sum of its proper divisors (4999487).

23538505 is an equidigital number, since it uses as much as digits as its factorization.

23538505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48635.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 23538505 is about 4851.6497194253. The cubic root of 23538505 is about 286.5890714507.

The spelling of 23538505 in words is "twenty-three million, five hundred thirty-eight thousand, five hundred five".