20401144011 has 12 divisors (see below), whose sum is σ = 29484127192. Its totient is φ = 13593466656.

The previous prime is 20401144007. The next prime is 20401144033. The reversal of 20401144011 is 11044110402.

20401144011 is a `hidden beast` number, since 204 + 0 + 11 + 440 + 11 = 666.

It is not a de Polignac number, because 20401144011 - 2² = 20401144007 is a prime.

It is a super-2 number, since 2×20401144011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401144411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 590266 + ... + 623871.

Almost surely, 2^20401144011 is an apocalyptic number.

20401144011 is a deficient number, since it is larger than the sum of its proper divisors (9082983181).

20401144011 is a wasteful number, since it uses less digits than its factorization.

20401144011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216010 (or 1216007 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20401144011 its reverse (11044110402), we get a palindrome (31445254413).

The spelling of 20401144011 in words is "twenty billion, four hundred one million, one hundred forty-four thousand, eleven".