20105020421404 has 12 divisors (see below), whose sum is σ = 35260106317128. Its totient is φ = 10030704330800.

The previous prime is 20105020421401. The next prime is 20105020421407. The reversal of 20105020421404 is 40412402050102.

It is an interprime number because it is at equal distance from previous prime (20105020421401) and next prime (20105020421407).

It is a super-2 number, since 2×20105020421404² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20105020421401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5451467902 + ... + 5451471589.

It is an arithmetic number, because the mean of its divisors is an integer number (2938342193094).

Almost surely, 2^{20105020421404} is an apocalyptic number.

It is an amenable number.

20105020421404 is a deficient number, since it is larger than the sum of its proper divisors (15155085895724).

20105020421404 is a wasteful number, since it uses less digits than its factorization.

20105020421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10902939956 (or 10902939954 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20105020421404 its reverse (40412402050102), we get a palindrome (60517422471506).

The spelling of 20105020421404 in words is "twenty trillion, one hundred five billion, twenty million, four hundred twenty-one thousand, four hundred four".