20404240402 has 16 divisors (see below), whose sum is σ = 37669367232. Its totient is φ = 8072007120.

The previous prime is 20404240399. The next prime is 20404240403.

20404240402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20404240403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56055424 + ... + 56055787.

It is an arithmetic number, because the mean of its divisors is an integer number (2354335452).

Almost surely, 2^20404240402 is an apocalyptic number.

20404240402 is a deficient number, since it is larger than the sum of its proper divisors (17265126830).

20404240402 is a wasteful number, since it uses less digits than its factorization.

20404240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112111233.

The product of its (nonzero) digits is 2048, while the sum is 22.

The spelling of 20404240402 in words is "twenty billion, four hundred four million, two hundred forty thousand, four hundred two".