20042402 has 8 divisors (see below), whose sum is σ = 30181356. Its totient is φ = 9981952.

The previous prime is 20042389. The next prime is 20042413. The reversal of 20042402 is 20424002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19175641 + 866761 = 4379^2 + 931^2 .

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18983 + ... + 20010.

Almost surely, 2^20042402 is an apocalyptic number.

20042402 is a deficient number, since it is larger than the sum of its proper divisors (10138954).

20042402 is a wasteful number, since it uses less digits than its factorization.

20042402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39252.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20042402 is about 4476.8741326957. The cubic root of 20042402 is about 271.6334541471.

Adding to 20042402 its reverse (20424002), we get a palindrome (40466404).

The spelling of 20042402 in words is "twenty million, forty-two thousand, four hundred two".