20732227 has 4 divisors (see below), whose sum is σ = 20830696. Its totient is φ = 20633760.

The previous prime is 20732221. The next prime is 20732233. The reversal of 20732227 is 72223702.

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

It is an interprime number because it is at equal distance from previous prime (20732221) and next prime (20732233).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20732227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20732221) 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, 48918 + ... + 49339.

It is an arithmetic number, because the mean of its divisors is an integer number (5207674).

Almost surely, 2^20732227 is an apocalyptic number.

20732227 is a deficient number, since it is larger than the sum of its proper divisors (98469).

20732227 is an equidigital number, since it uses as much as digits as its factorization.

20732227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98468.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20732227 is about 4553.2655314620. The cubic root of 20732227 is about 274.7147543671.

Adding to 20732227 its reverse (72223702), we get a palindrome (92955929).

The spelling of 20732227 in words is "twenty million, seven hundred thirty-two thousand, two hundred twenty-seven".