21320031014 has 8 divisors (see below), whose sum is σ = 32004821928. Its totient is φ = 10651757040.

The previous prime is 21320031013. The next prime is 21320031071. The reversal of 21320031014 is 41013002312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21320030983 and 21320031001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320031013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4126007 + ... + 4131170.

It is an arithmetic number, because the mean of its divisors is an integer number (4000602741).

Almost surely, 2^21320031014 is an apocalyptic number.

21320031014 is a deficient number, since it is larger than the sum of its proper divisors (10684790914).

21320031014 is a wasteful number, since it uses less digits than its factorization.

21320031014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258470.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21320031014 its reverse (41013002312), we get a palindrome (62333033326).

The spelling of 21320031014 in words is "twenty-one billion, three hundred twenty million, thirty-one thousand, fourteen".