20114440021 has 4 divisors (see below), whose sum is σ = 21661704652. Its totient is φ = 18567175392.

The previous prime is 20114440019. The next prime is 20114440091. The reversal of 20114440021 is 12004441102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12004441102 = 2 ⋅6002220551.

It can be written as a sum of positive squares in 2 ways, for example, as 2768232996 + 17346207025 = 52614^2 + 131705^2 .

It is a cyclic number.

It is not a de Polignac number, because 20114440021 - 2¹ = 20114440019 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 (20114440091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773632296 + ... + 773632321.

It is an arithmetic number, because the mean of its divisors is an integer number (5415426163).

Almost surely, 2^20114440021 is an apocalyptic number.

It is an amenable number.

20114440021 is a deficient number, since it is larger than the sum of its proper divisors (1547264631).

20114440021 is a wasteful number, since it uses less digits than its factorization.

20114440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547264630.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20114440021 its reverse (12004441102), we get a palindrome (32118881123).

It can be divided in two parts, 201144 and 40021, that added together give a triangular number (241165 = T₆₉₄).

The spelling of 20114440021 in words is "twenty billion, one hundred fourteen million, four hundred forty thousand, twenty-one".