21002030313 has 32 divisors (see below), whose sum is σ = 31042206720. Its totient is φ = 12523220160.

The previous prime is 21002030311. The next prime is 21002030383. The reversal of 21002030313 is 31303020012.

It is not a de Polignac number, because 21002030313 - 2¹ = 21002030311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002030292 and 21002030301.

It is not an unprimeable number, because it can be changed into a prime (21002030311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1955803 + ... + 1966511.

It is an arithmetic number, because the mean of its divisors is an integer number (970068960).

Almost surely, 2^21002030313 is an apocalyptic number.

It is an amenable number.

21002030313 is a deficient number, since it is larger than the sum of its proper divisors (10040176407).

21002030313 is a wasteful number, since it uses less digits than its factorization.

21002030313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11677.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21002030313 its reverse (31303020012), we get a palindrome (52305050325).

The spelling of 21002030313 in words is "twenty-one billion, two million, thirty thousand, three hundred thirteen".