21014424452 has 12 divisors (see below), whose sum is σ = 42028848960. Its totient is φ = 9006181896.

The previous prime is 21014424451. The next prime is 21014424461. The reversal of 21014424452 is 25442441012.

It is a happy number.

21014424452 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21014424451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375257552 + ... + 375257607.

It is an arithmetic number, because the mean of its divisors is an integer number (3502404080).

Almost surely, 2^21014424452 is an apocalyptic number.

It is an amenable number.

21014424452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21014424452 is a wasteful number, since it uses less digits than its factorization.

21014424452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750515170 (or 750515168 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 21014424452 its reverse (25442441012), we get a palindrome (46456865464).

The spelling of 21014424452 in words is "twenty-one billion, fourteen million, four hundred twenty-four thousand, four hundred fifty-two".