21232416345 has 16 divisors (see below), whose sum is σ = 38824990080. Its totient is φ = 9706247424.

The previous prime is 21232416319. The next prime is 21232416371. The reversal of 21232416345 is 54361423212.

It is an interprime number because it is at equal distance from previous prime (21232416319) and next prime (21232416371).

It is not a de Polignac number, because 21232416345 - 2⁵ = 21232416313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101106640 + ... + 101106849.

It is an arithmetic number, because the mean of its divisors is an integer number (2426561880).

Almost surely, 2^21232416345 is an apocalyptic number.

It is an amenable number.

21232416345 is a deficient number, since it is larger than the sum of its proper divisors (17592573735).

21232416345 is a wasteful number, since it uses less digits than its factorization.

21232416345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202213504.

The product of its digits is 34560, while the sum is 33.

Adding to 21232416345 its reverse (54361423212), we get a palindrome (75593839557).

The spelling of 21232416345 in words is "twenty-one billion, two hundred thirty-two million, four hundred sixteen thousand, three hundred forty-five".