20245523 has 4 divisors (see below), whose sum is σ = 20627568. Its totient is φ = 19863480.

The previous prime is 20245517. The next prime is 20245529. The reversal of 20245523 is 32554202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20245517) and next prime (20245529).

It is a cyclic number.

It is not a de Polignac number, because 20245523 - 2¹⁶ = 20179987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190943 + ... + 191048.

It is an arithmetic number, because the mean of its divisors is an integer number (5156892).

Almost surely, 2^20245523 is an apocalyptic number.

20245523 is a deficient number, since it is larger than the sum of its proper divisors (382045).

20245523 is an equidigital number, since it uses as much as digits as its factorization.

20245523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382044.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20245523 is about 4499.5025280580. The cubic root of 20245523 is about 272.5480004100.

Adding to 20245523 its reverse (32554202), we get a palindrome (52799725).

The spelling of 20245523 in words is "twenty million, two hundred forty-five thousand, five hundred twenty-three".