21402321414 has 16 divisors (see below), whose sum is σ = 42944075328. Its totient is φ = 7110868392.

The previous prime is 21402321359. The next prime is 21402321431. The reversal of 21402321414 is 41412320412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5807692 + ... + 5811375.

It is an arithmetic number, because the mean of its divisors is an integer number (2684004708).

Almost surely, 2^21402321414 is an apocalyptic number.

21402321414 is an abundant number, since it is smaller than the sum of its proper divisors (21541753914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21402321414 is a wasteful number, since it uses less digits than its factorization.

21402321414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11619379.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21402321414 its reverse (41412320412), we get a palindrome (62814641826).

The spelling of 21402321414 in words is "twenty-one billion, four hundred two million, three hundred twenty-one thousand, four hundred fourteen".