20420002 has 8 divisors (see below), whose sum is σ = 31686300. Its totient is φ = 9857904.

The previous prime is 20419981. The next prime is 20420011. The reversal of 20420002 is 20002402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 1766241 = 4319^2 + 1329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175977 + ... + 176092.

Almost surely, 2^20420002 is an apocalyptic number.

20420002 is a deficient number, since it is larger than the sum of its proper divisors (11266298).

20420002 is a wasteful number, since it uses less digits than its factorization.

20420002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352100.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20420002 is about 4518.8496323733. The cubic root of 20420002 is about 273.3287153030.

Adding to 20420002 its reverse (20002402), we get a palindrome (40422404).

The spelling of 20420002 in words is "twenty million, four hundred twenty thousand, two".