21002000313 has 32 divisors (see below), whose sum is σ = 32561464320. Its totient is φ = 11791938240.

The previous prime is 21002000293. The next prime is 21002000329. The reversal of 21002000313 is 31300020012.

It is a happy number.

It is not a de Polignac number, because 21002000313 - 2¹⁴ = 21001983929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002000813) 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 31 ways as a sum of consecutive naturals, for example, 4384906 + ... + 4389692.

It is an arithmetic number, because the mean of its divisors is an integer number (1017545760).

Almost surely, 2^21002000313 is an apocalyptic number.

It is an amenable number.

21002000313 is a deficient number, since it is larger than the sum of its proper divisors (11559464007).

21002000313 is a wasteful number, since it uses less digits than its factorization.

21002000313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8397.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21002000313 its reverse (31300020012), we get a palindrome (52302020325).

The spelling of 21002000313 in words is "twenty-one billion, two million, three hundred thirteen", and thus it is an aban number.