20440420002 has 24 divisors (see below), whose sum is σ = 44610849036. Its totient is φ = 6763739136.

The previous prime is 20440419973. The next prime is 20440420009. The reversal of 20440420002 is 20002404402.

20440420002 is a `hidden beast` number, since 20 + 440 + 4 + 200 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16871671881 + 3568748121 = 129891^2 + 59739^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20440420009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4141983 + ... + 4146914.

Almost surely, 2^20440420002 is an apocalyptic number.

20440420002 is an abundant number, since it is smaller than the sum of its proper divisors (24170429034).

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

20440420002 is a wasteful number, since it uses less digits than its factorization.

20440420002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289042 (or 8289039 counting only the distinct ones).

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

Adding to 20440420002 its reverse (20002404402), we get a palindrome (40442824404).

The spelling of 20440420002 in words is "twenty billion, four hundred forty million, four hundred twenty thousand, two".