20752227 has 16 divisors (see below), whose sum is σ = 31576480. Its totient is φ = 13460256.

The previous prime is 20752217. The next prime is 20752229. The reversal of 20752227 is 72225702.

It is a happy number.

It is not a de Polignac number, because 20752227 - 2¹¹ = 20750179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20752227.

It is not an unprimeable number, because it can be changed into a prime (20752229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9388 + ... + 11385.

It is an arithmetic number, because the mean of its divisors is an integer number (1973530).

Almost surely, 2^20752227 is an apocalyptic number.

20752227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20752227 is a deficient number, since it is larger than the sum of its proper divisors (10824253).

20752227 is a wasteful number, since it uses less digits than its factorization.

20752227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20819 (or 20813 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20752227 is about 4555.4612280207. The cubic root of 20752227 is about 274.8030634086.

Adding to 20752227 its reverse (72225702), we get a palindrome (92977929).

The spelling of 20752227 in words is "twenty million, seven hundred fifty-two thousand, two hundred twenty-seven".