20420032 has 28 divisors (see below), whose sum is σ = 40808656. Its totient is φ = 10137600.

The previous prime is 20420027. The next prime is 20420033. The reversal of 20420032 is 23002402.

It is a junction number, because it is equal to n+sod(n) for n = 20419994 and 20420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420033) 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, 8608 + ... + 10720.

It is an arithmetic number, because the mean of its divisors is an integer number (1457452).

Almost surely, 2^20420032 is an apocalyptic number.

It is an amenable number.

20420032 is a deficient number, since it is larger than the sum of its proper divisors (20388624).

20420032 is a wasteful number, since it uses less digits than its factorization.

20420032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20420032 is about 4518.8529518009. The cubic root of 20420032 is about 273.3288491564.

Adding to 20420032 its reverse (23002402), we get a palindrome (43422434).

The spelling of 20420032 in words is "twenty million, four hundred twenty thousand, thirty-two".