21311014014 has 24 divisors (see below), whose sum is σ = 46186584912. Its totient is φ = 7101714240.

The previous prime is 21311014001. The next prime is 21311014019. The reversal of 21311014014 is 41041011312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311014019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95179 + ... + 227334.

It is an arithmetic number, because the mean of its divisors is an integer number (1924441038).

Almost surely, 2^21311014014 is an apocalyptic number.

21311014014 is an abundant number, since it is smaller than the sum of its proper divisors (24875570898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311014014 is a wasteful number, since it uses less digits than its factorization.

21311014014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326192 (or 326189 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21311014014 its reverse (41041011312), we get a palindrome (62352025326).

The spelling of 21311014014 in words is "twenty-one billion, three hundred eleven million, fourteen thousand, fourteen".