20113042021 has 8 divisors (see below), whose sum is σ = 21173878080. Its totient is φ = 19052431488.

The previous prime is 20113042007. The next prime is 20113042031. The reversal of 20113042021 is 12024031102.

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

It is not a de Polignac number, because 20113042021 - 2³³ = 11523107429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113041986 and 20113042004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113042031) 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, 145200 + ... + 247606.

It is an arithmetic number, because the mean of its divisors is an integer number (2646734760).

Almost surely, 2^20113042021 is an apocalyptic number.

It is an amenable number.

20113042021 is a deficient number, since it is larger than the sum of its proper divisors (1060836059).

20113042021 is a wasteful number, since it uses less digits than its factorization.

20113042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112763.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20113042021 its reverse (12024031102), we get a palindrome (32137073123).

The spelling of 20113042021 in words is "twenty billion, one hundred thirteen million, forty-two thousand, twenty-one".