20522263 has 8 divisors (see below), whose sum is σ = 21102480. Its totient is φ = 19945920.

The previous prime is 20522251. The next prime is 20522287. The reversal of 20522263 is 36222502.

It is a happy number.

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 20522263 - 2¹³ = 20514071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522363) 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, 12208 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (2637810).

Almost surely, 2^20522263 is an apocalyptic number.

20522263 is a deficient number, since it is larger than the sum of its proper divisors (580217).

20522263 is a wasteful number, since it uses less digits than its factorization.

20522263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937.

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

The square root of 20522263 is about 4530.1504390031. The cubic root of 20522263 is about 273.7842219333.

Adding to 20522263 its reverse (36222502), we get a palindrome (56744765).

The spelling of 20522263 in words is "twenty million, five hundred twenty-two thousand, two hundred sixty-three".