21312014020 has 48 divisors (see below), whose sum is σ = 50014734336. Its totient is φ = 7560800000.

The previous prime is 21312013907. The next prime is 21312014027. The reversal of 21312014020 is 2041021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312013985 and 21312014003.

It is not an unprimeable number, because it can be changed into a prime (21312014027) 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 15 ways as a sum of consecutive naturals, for example, 1172356 + ... + 1190395.

It is an arithmetic number, because the mean of its divisors is an integer number (1041973632).

Almost surely, 2^21312014020 is an apocalyptic number.

21312014020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312014020 is an abundant number, since it is smaller than the sum of its proper divisors (28702720316).

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

21312014020 is a wasteful number, since it uses less digits than its factorization.

21312014020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362812 (or 2362810 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21312014020 its reverse (2041021312), we get a palindrome (23353035332).

The spelling of 21312014020 in words is "twenty-one billion, three hundred twelve million, fourteen thousand, twenty".