21313400302 has 32 divisors (see below), whose sum is σ = 35062168320. Its totient is φ = 9688170240.

The previous prime is 21313400281. The next prime is 21313400321. The reversal of 21313400302 is 20300431312.

It is a super-2 number, since 2×21313400302² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21313400302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93663 + ... + 226714.

It is an arithmetic number, because the mean of its divisors is an integer number (1095692760).

Almost surely, 2^21313400302 is an apocalyptic number.

21313400302 is a deficient number, since it is larger than the sum of its proper divisors (13748768018).

21313400302 is a wasteful number, since it uses less digits than its factorization.

21313400302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320476.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21313400302 its reverse (20300431312), we get a palindrome (41613831614).

The spelling of 21313400302 in words is "twenty-one billion, three hundred thirteen million, four hundred thousand, three hundred two".