21232425416 has 8 divisors (see below), whose sum is σ = 39810797670. Its totient is φ = 10616212704.

The previous prime is 21232425407. The next prime is 21232425437. The reversal of 21232425416 is 61452423212.

It can be written as a sum of positive squares in only one way, i.e., 11001912100 + 10230513316 = 104890^2 + 101146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327026581 + ... + 1327026596.

Almost surely, 2^21232425416 is an apocalyptic number.

It is an amenable number.

21232425416 is a deficient number, since it is larger than the sum of its proper divisors (18578372254).

21232425416 is a wasteful number, since it uses less digits than its factorization.

21232425416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654053183 (or 2654053179 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

Adding to 21232425416 its reverse (61452423212), we get a palindrome (82684848628).

The spelling of 21232425416 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty-five thousand, four hundred sixteen".