21400403302 has 8 divisors (see below), whose sum is σ = 32120510976. Its totient is φ = 10693566312.

The previous prime is 21400403293. The next prime is 21400403309. The reversal of 21400403302 is 20330400412.

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

It is a super-2 number, since 2×21400403302² (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 21400403302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21400403309) 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 3 ways as a sum of consecutive naturals, for example, 3313638 + ... + 3320089.

It is an arithmetic number, because the mean of its divisors is an integer number (4015063872).

Almost surely, 2^21400403302 is an apocalyptic number.

21400403302 is a deficient number, since it is larger than the sum of its proper divisors (10720107674).

21400403302 is a wasteful number, since it uses less digits than its factorization.

21400403302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6635342.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21400403302 its reverse (20330400412), we get a palindrome (41730803714).

The spelling of 21400403302 in words is "twenty-one billion, four hundred million, four hundred three thousand, three hundred two".