20410402 has 4 divisors (see below), whose sum is σ = 30615606. Its totient is φ = 10205200.

The previous prime is 20410363. The next prime is 20410409. The reversal of 20410402 is 20401402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 3345241 = 4131^2 + 1829^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20410409) by changing a digit.

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 as a sum of consecutive naturals, namely, 5102599 + ... + 5102602.

Almost surely, 2^20410402 is an apocalyptic number.

20410402 is a deficient number, since it is larger than the sum of its proper divisors (10205204).

20410402 is a wasteful number, since it uses less digits than its factorization.

20410402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205203.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20410402 is about 4517.7872902561. The cubic root of 20410402 is about 273.2858754938.

Adding to 20410402 its reverse (20401402), we get a palindrome (40811804).

The spelling of 20410402 in words is "twenty million, four hundred ten thousand, four hundred two".