21416298845 has 8 divisors (see below), whose sum is σ = 27211297464. Its totient is φ = 16125213184.

The previous prime is 21416298809. The next prime is 21416298853. The reversal of 21416298845 is 54889261412.

It can be written as a sum of positive squares in 4 ways, for example, as 5970034756 + 15446264089 = 77266^2 + 124283^2 .

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

It is not a de Polignac number, because 21416298845 - 2¹⁶ = 21416233309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21416298793 and 21416298802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125978144 + ... + 125978313.

It is an arithmetic number, because the mean of its divisors is an integer number (3401412183).

Almost surely, 2^21416298845 is an apocalyptic number.

It is an amenable number.

21416298845 is a deficient number, since it is larger than the sum of its proper divisors (5794998619).

21416298845 is a wasteful number, since it uses less digits than its factorization.

21416298845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251956479.

The product of its digits is 1105920, while the sum is 50.

The spelling of 21416298845 in words is "twenty-one billion, four hundred sixteen million, two hundred ninety-eight thousand, eight hundred forty-five".