20404421202 has 16 divisors (see below), whose sum is σ = 44518737312. Its totient is φ = 6183157920.

The previous prime is 20404421179. The next prime is 20404421209. The reversal of 20404421202 is 20212440402.

It is not an unprimeable number, because it can be changed into a prime (20404421209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154578883 + ... + 154579014.

It is an arithmetic number, because the mean of its divisors is an integer number (2782421082).

Almost surely, 2^20404421202 is an apocalyptic number.

20404421202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20404421202 is an abundant number, since it is smaller than the sum of its proper divisors (24114316110).

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

20404421202 is a wasteful number, since it uses less digits than its factorization.

20404421202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309157913.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20404421202 its reverse (20212440402), we get a palindrome (40616861604).

The spelling of 20404421202 in words is "twenty billion, four hundred four million, four hundred twenty-one thousand, two hundred two".