20420332 has 12 divisors (see below), whose sum is σ = 37837800. Its totient is φ = 9609536.

The previous prime is 20420329. The next prime is 20420347. The reversal of 20420332 is 23302402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150082 + ... + 150217.

It is an arithmetic number, because the mean of its divisors is an integer number (3153150).

Almost surely, 2^20420332 is an apocalyptic number.

It is an amenable number.

20420332 is a deficient number, since it is larger than the sum of its proper divisors (17417468).

20420332 is a wasteful number, since it uses less digits than its factorization.

20420332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300320 (or 300318 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 20420332 is about 4518.8861459435. The cubic root of 20420332 is about 273.3301876827.

Adding to 20420332 its reverse (23302402), we get a palindrome (43722734).

The spelling of 20420332 in words is "twenty million, four hundred twenty thousand, three hundred thirty-two".