21310002013 has 8 divisors (see below), whose sum is σ = 21482683040. Its totient is φ = 21137598000.

The previous prime is 21310002011. The next prime is 21310002041. The reversal of 21310002013 is 31020001312.

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

It is a cyclic number.

It is not a de Polignac number, because 21310002013 - 2¹ = 21310002011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310001984 and 21310002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310002011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86638 + ... + 223888.

It is an arithmetic number, because the mean of its divisors is an integer number (2685335380).

Almost surely, 2^21310002013 is an apocalyptic number.

It is an amenable number.

21310002013 is a deficient number, since it is larger than the sum of its proper divisors (172681027).

21310002013 is a wasteful number, since it uses less digits than its factorization.

21310002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138507.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21310002013 its reverse (31020001312), we get a palindrome (52330003325).

The spelling of 21310002013 in words is "twenty-one billion, three hundred ten million, two thousand, thirteen".