20220040404 has 18 divisors (see below), whose sum is σ = 51111768890. Its totient is φ = 6740013456.

The previous prime is 20220040387. The next prime is 20220040409. The reversal of 20220040404 is 40404002202.

20220040404 is a `hidden beast` number, since 2 + 0 + 220 + 0 + 40 + 404 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15650010000 + 4570030404 = 125100^2 + 67602^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

20220040404 is a modest number, since divided by 40404 gives 20220 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220040409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280833859 + ... + 280833930.

Almost surely, 2^20220040404 is an apocalyptic number.

It is an amenable number.

20220040404 is an abundant number, since it is smaller than the sum of its proper divisors (30891728486).

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

20220040404 is a wasteful number, since it uses less digits than its factorization.

20220040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561667799 (or 561667794 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20220040404 its reverse (40404002202), we get a palindrome (60624042606).

The spelling of 20220040404 in words is "twenty billion, two hundred twenty million, forty thousand, four hundred four".