21422198465 has 8 divisors (see below), whose sum is σ = 25709179560. Its totient is φ = 17136064512.

The previous prime is 21422198461. The next prime is 21422198503. The reversal of 21422198465 is 56489122412.

It can be written as a sum of positive squares in 4 ways, for example, as 678133681 + 20744064784 = 26041^2 + 144028^2 .

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 21422198465 - 2² = 21422198461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21422198461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154754 + ... + 258443.

It is an arithmetic number, because the mean of its divisors is an integer number (3213647445).

Almost surely, 2^21422198465 is an apocalyptic number.

It is an amenable number.

21422198465 is a deficient number, since it is larger than the sum of its proper divisors (4286981095).

21422198465 is a wasteful number, since it uses less digits than its factorization.

21422198465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423571.

The product of its digits is 276480, while the sum is 44.

The spelling of 21422198465 in words is "twenty-one billion, four hundred twenty-two million, one hundred ninety-eight thousand, four hundred sixty-five".