20402404420002 has 48 divisors (see below), whose sum is σ = 45520993219296. Its totient is φ = 6090269961600.

The previous prime is 20402404420001. The next prime is 20402404420009. The reversal of 20402404420002 is 20002440420402.

It is a super-2 number, since 2×20402404420002² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20402404420001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209671399 + ... + 209768682.

It is an arithmetic number, because the mean of its divisors is an integer number (948354025402).

Almost surely, 2^{20402404420002} is an apocalyptic number.

20402404420002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20402404420002 is an abundant number, since it is smaller than the sum of its proper divisors (25118588799294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402404420002 is a wasteful number, since it uses less digits than its factorization.

20402404420002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419440175 (or 419440164 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20402404420002 its reverse (20002440420402), we get a palindrome (40404844840404).

The spelling of 20402404420002 in words is "twenty trillion, four hundred two billion, four hundred four million, four hundred twenty thousand, two".