20401144223 has 4 divisors (see below), whose sum is σ = 20405296560. Its totient is φ = 20396991888.

The previous prime is 20401144177. The next prime is 20401144241. The reversal of 20401144223 is 32244110402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20401144223 - 2¹⁴ = 20401127839 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 (20400144223) 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, 2068790 + ... + 2078627.

It is an arithmetic number, because the mean of its divisors is an integer number (5101324140).

Almost surely, 2^20401144223 is an apocalyptic number.

20401144223 is a deficient number, since it is larger than the sum of its proper divisors (4152337).

20401144223 is an equidigital number, since it uses as much as digits as its factorization.

20401144223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152336.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20401144223 its reverse (32244110402), we get a palindrome (52645254625).

The spelling of 20401144223 in words is "twenty billion, four hundred one million, one hundred forty-four thousand, two hundred twenty-three".