21011314424 has 32 divisors (see below), whose sum is σ = 41764669200. Its totient is φ = 9875581440.

The previous prime is 21011314411. The next prime is 21011314459. The reversal of 21011314424 is 42441311012.

It is a self number, because there is not a number n which added to its sum of digits gives 21011314424.

It is a congruent number.

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, 17567 + ... + 205745.

Almost surely, 2^21011314424 is an apocalyptic number.

It is an amenable number.

21011314424 is a deficient number, since it is larger than the sum of its proper divisors (20753354776).

21011314424 is a wasteful number, since it uses less digits than its factorization.

21011314424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189023 (or 189019 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21011314424 its reverse (42441311012), we get a palindrome (63452625436).

The spelling of 21011314424 in words is "twenty-one billion, eleven million, three hundred fourteen thousand, four hundred twenty-four".