16020051311 has 4 divisors (see below), whose sum is σ = 17476419624. Its totient is φ = 14563683000.

The previous prime is 16020051277. The next prime is 16020051331. The reversal of 16020051311 is 11315002061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11315002061 = 11 ⋅1028636551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16020051311 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 (16020051331) 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, 728184140 + ... + 728184161.

It is an arithmetic number, because the mean of its divisors is an integer number (4369104906).

Almost surely, 2^16020051311 is an apocalyptic number.

16020051311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16020051311 is a deficient number, since it is larger than the sum of its proper divisors (1456368313).

16020051311 is a wasteful number, since it uses less digits than its factorization.

16020051311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456368312.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 16020051311 its reverse (11315002061), we get a palindrome (27335053372).

The spelling of 16020051311 in words is "sixteen billion, twenty million, fifty-one thousand, three hundred eleven".