21424206316 has 12 divisors (see below), whose sum is σ = 37766028888. Its totient is φ = 10633912352.

The previous prime is 21424206283. The next prime is 21424206329. The reversal of 21424206316 is 61360242412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19547086 + ... + 19548181.

It is an arithmetic number, because the mean of its divisors is an integer number (3147169074).

Almost surely, 2^21424206316 is an apocalyptic number.

It is an amenable number.

21424206316 is a deficient number, since it is larger than the sum of its proper divisors (16341822572).

21424206316 is a wasteful number, since it uses less digits than its factorization.

21424206316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39095408 (or 39095406 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21424206316 its reverse (61360242412), we get a palindrome (82784448728).

The spelling of 21424206316 in words is "twenty-one billion, four hundred twenty-four million, two hundred six thousand, three hundred sixteen".