20525223 has 8 divisors (see below), whose sum is σ = 28556928. Its totient is φ = 13088504.

The previous prime is 20525213. The next prime is 20525231. The reversal of 20525223 is 32252502.

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 20525223 - 2⁶ = 20525159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20525223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148665 + ... + 148802.

It is an arithmetic number, because the mean of its divisors is an integer number (3569616).

Almost surely, 2^20525223 is an apocalyptic number.

20525223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20525223 is a deficient number, since it is larger than the sum of its proper divisors (8031705).

20525223 is a wasteful number, since it uses less digits than its factorization.

20525223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297493.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20525223 is about 4530.4771271909. The cubic root of 20525223 is about 273.7973842623.

Adding to 20525223 its reverse (32252502), we get a palindrome (52777725).

It can be divided in two parts, 205 and 25223, that multiplied together give a palindrome (5170715).

The spelling of 20525223 in words is "twenty million, five hundred twenty-five thousand, two hundred twenty-three".