21436116311 has 6 divisors (see below), whose sum is σ = 22408643880. Its totient is φ = 20504110748.

The previous prime is 21436116283. The next prime is 21436116329. The reversal of 21436116311 is 11361163412.

It is not a de Polignac number, because 21436116311 - 2²² = 21431922007 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 (21436116371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20260451 + ... + 20261508.

It is an arithmetic number, because the mean of its divisors is an integer number (3734773980).

Almost surely, 2^21436116311 is an apocalyptic number.

21436116311 is a deficient number, since it is larger than the sum of its proper divisors (972527569).

21436116311 is an equidigital number, since it uses as much as digits as its factorization.

21436116311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40522005 (or 40521982 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

Adding to 21436116311 its reverse (11361163412), we get a palindrome (32797279723).

The spelling of 21436116311 in words is "twenty-one billion, four hundred thirty-six million, one hundred sixteen thousand, three hundred eleven".