21682212424 has 32 divisors (see below), whose sum is σ = 42637129920. Its totient is φ = 10317098176.

The previous prime is 21682212389. The next prime is 21682212469. The reversal of 21682212424 is 42421228612.

It is a self number, because there is not a number n which added to its sum of digits gives 21682212424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262834 + ... + 335329.

It is an arithmetic number, because the mean of its divisors is an integer number (1332410310).

Almost surely, 2^21682212424 is an apocalyptic number.

It is an amenable number.

21682212424 is a deficient number, since it is larger than the sum of its proper divisors (20954917496).

21682212424 is a wasteful number, since it uses less digits than its factorization.

21682212424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598389 (or 598385 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The spelling of 21682212424 in words is "twenty-one billion, six hundred eighty-two million, two hundred twelve thousand, four hundred twenty-four".