20402144011 has 8 divisors (see below), whose sum is σ = 20872599264. Its totient is φ = 19936775040.

The previous prime is 20402143999. The next prime is 20402144039. The reversal of 20402144011 is 11044120402.

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 20402144011 - 2¹⁵ = 20402111243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402144011.

It is not an unprimeable number, because it can be changed into a prime (20402144911) 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, 1263456 + ... + 1279501.

It is an arithmetic number, because the mean of its divisors is an integer number (2609074908).

Almost surely, 2^20402144011 is an apocalyptic number.

20402144011 is a deficient number, since it is larger than the sum of its proper divisors (470455253).

20402144011 is a wasteful number, since it uses less digits than its factorization.

20402144011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543141.

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

Adding to 20402144011 its reverse (11044120402), we get a palindrome (31446264413).

The spelling of 20402144011 in words is "twenty billion, four hundred two million, one hundred forty-four thousand, eleven".