20523226 has 4 divisors (see below), whose sum is σ = 30784842. Its totient is φ = 10261612.

The previous prime is 20523221. The next prime is 20523227. The reversal of 20523226 is 62232502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62232502 = 2 ⋅31116251.

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 8970025 = 3399^2 + 2995^2 .

It is a super-3 number, since 3×20523226³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20523197 and 20523206.

It is not an unprimeable number, because it can be changed into a prime (20523221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130805 + ... + 5130808.

Almost surely, 2^20523226 is an apocalyptic number.

20523226 is a deficient number, since it is larger than the sum of its proper divisors (10261616).

20523226 is a wasteful number, since it uses less digits than its factorization.

20523226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261615.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20523226 is about 4530.2567256172. The cubic root of 20523226 is about 273.7885042758.

Adding to 20523226 its reverse (62232502), we get a palindrome (82755728).

The spelling of 20523226 in words is "twenty million, five hundred twenty-three thousand, two hundred twenty-six".