21421446363 has 6 divisors (see below), whose sum is σ = 30942089204. Its totient is φ = 14280964236.

The previous prime is 21421446329. The next prime is 21421446367. The reversal of 21421446363 is 36364412412.

21421446363 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 14 + 4 + 636 + 3 = 666.

It is not a de Polignac number, because 21421446363 - 2²⁹ = 20884575451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21421446367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1190080345 + ... + 1190080362.

Almost surely, 2^21421446363 is an apocalyptic number.

21421446363 is a deficient number, since it is larger than the sum of its proper divisors (9520642841).

21421446363 is a wasteful number, since it uses less digits than its factorization.

21421446363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380160713 (or 2380160710 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

Adding to 21421446363 its reverse (36364412412), we get a palindrome (57785858775).

The spelling of 21421446363 in words is "twenty-one billion, four hundred twenty-one million, four hundred forty-six thousand, three hundred sixty-three".