21142004024 has 32 divisors (see below), whose sum is σ = 39933717120. Its totient is φ = 10493301216.

The previous prime is 21142004017. The next prime is 21142004057. The reversal of 21142004024 is 42040024112.

It is a junction number, because it is equal to n+sod(n) for n = 21142003987 and 21142004005.

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, 577679 + ... + 613185.

It is an arithmetic number, because the mean of its divisors is an integer number (1247928660).

Almost surely, 2^21142004024 is an apocalyptic number.

It is an amenable number.

21142004024 is a deficient number, since it is larger than the sum of its proper divisors (18791713096).

21142004024 is a wasteful number, since it uses less digits than its factorization.

21142004024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36059 (or 36055 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21142004024 its reverse (42040024112), we get a palindrome (63182028136).

The spelling of 21142004024 in words is "twenty-one billion, one hundred forty-two million, four thousand, twenty-four".