21424442412 has 12 divisors (see below), whose sum is σ = 49990365656. Its totient is φ = 7141480800.

The previous prime is 21424442383. The next prime is 21424442453.

21424442412 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21424442412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892685089 + ... + 892685112.

Almost surely, 2^21424442412 is an apocalyptic number.

It is an amenable number.

21424442412 is an abundant number, since it is smaller than the sum of its proper divisors (28565923244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21424442412 is a wasteful number, since it uses less digits than its factorization.

21424442412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785370208 (or 1785370206 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

The spelling of 21424442412 in words is "twenty-one billion, four hundred twenty-four million, four hundred forty-two thousand, four hundred twelve".