20524253 has 4 divisors (see below), whose sum is σ = 21731580. Its totient is φ = 19316928.

The previous prime is 20524249. The next prime is 20524267. The reversal of 20524253 is 35242502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6061444 + 14462809 = 2462^2 + 3803^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524253 - 2² = 20524249 is a prime.

It is a super-2 number, since 2×20524253² = 842489922416018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20524213) 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, 603638 + ... + 603671.

It is an arithmetic number, because the mean of its divisors is an integer number (5432895).

Almost surely, 2^20524253 is an apocalyptic number.

It is an amenable number.

20524253 is a deficient number, since it is larger than the sum of its proper divisors (1207327).

20524253 is a wasteful number, since it uses less digits than its factorization.

20524253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207326.

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

The square root of 20524253 is about 4530.3700731839. The cubic root of 20524253 is about 273.7930710709.

Adding to 20524253 its reverse (35242502), we get a palindrome (55766755).

The spelling of 20524253 in words is "twenty million, five hundred twenty-four thousand, two hundred fifty-three".