20156144011 has 4 divisors (see below), whose sum is σ = 20160416392. Its totient is φ = 20151871632.

The previous prime is 20156143979. The next prime is 20156144033. The reversal of 20156144011 is 11044165102.

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 20156144011 - 2⁵ = 20156143979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20156144611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129106 + ... + 2138551.

It is an arithmetic number, because the mean of its divisors is an integer number (5040104098).

Almost surely, 2^20156144011 is an apocalyptic number.

20156144011 is a deficient number, since it is larger than the sum of its proper divisors (4272381).

20156144011 is an equidigital number, since it uses as much as digits as its factorization.

20156144011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272380.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 20156144011 in words is "twenty billion, one hundred fifty-six million, one hundred forty-four thousand, eleven".