21614314621 has 8 divisors (see below), whose sum is σ = 22025983320. Its totient is φ = 21202788672.

The previous prime is 21614314571. The next prime is 21614314639. The reversal of 21614314621 is 12641341612.

It can be written as a sum of positive squares in 4 ways, for example, as 299774596 + 21314540025 = 17314^2 + 145995^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21614314621 - 2⁷ = 21614314493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21614314651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299731 + ... + 364783.

It is an arithmetic number, because the mean of its divisors is an integer number (2753247915).

Almost surely, 2^21614314621 is an apocalyptic number.

It is an amenable number.

21614314621 is a deficient number, since it is larger than the sum of its proper divisors (411668699).

21614314621 is an equidigital number, since it uses as much as digits as its factorization.

21614314621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71375.

The product of its digits is 6912, while the sum is 31.

The spelling of 21614314621 in words is "twenty-one billion, six hundred fourteen million, three hundred fourteen thousand, six hundred twenty-one".