20327220 has 48 divisors (see below), whose sum is σ = 63241920. Its totient is φ = 5420448.

The previous prime is 20327191. The next prime is 20327233. The reversal of 20327220 is 2272302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20327193 and 20327202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18282 + ... + 19361.

It is an arithmetic number, because the mean of its divisors is an integer number (1317540).

Almost surely, 2^20327220 is an apocalyptic number.

20327220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20327220 is an abundant number, since it is smaller than the sum of its proper divisors (42914700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20327220 is a wasteful number, since it uses less digits than its factorization.

20327220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37661 (or 37653 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20327220 is about 4508.5718359587. The cubic root of 20327220 is about 272.9141137872.

Adding to 20327220 its reverse (2272302), we get a palindrome (22599522).

The spelling of 20327220 in words is "twenty million, three hundred twenty-seven thousand, two hundred twenty".