20110020421 has 8 divisors (see below), whose sum is σ = 20315835200. Its totient is φ = 19905253632.

The previous prime is 20110020419. The next prime is 20110020431. The reversal of 20110020421 is 12402001102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20110020421 - 2¹ = 20110020419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110020401) 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, 223395 + ... + 300208.

It is an arithmetic number, because the mean of its divisors is an integer number (2539479400).

Almost surely, 2^20110020421 is an apocalyptic number.

It is an amenable number.

20110020421 is a deficient number, since it is larger than the sum of its proper divisors (205814779).

20110020421 is a wasteful number, since it uses less digits than its factorization.

20110020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523995.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20110020421 its reverse (12402001102), we get a palindrome (32512021523).

The spelling of 20110020421 in words is "twenty billion, one hundred ten million, twenty thousand, four hundred twenty-one".