21150124804 has 12 divisors (see below), whose sum is σ = 37021750528. Its totient is φ = 10572481800.

The previous prime is 21150124783. The next prime is 21150124819. The reversal of 21150124804 is 40842105112.

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, 626652 + ... + 659539.

Almost surely, 2^21150124804 is an apocalyptic number.

It is an amenable number.

21150124804 is a deficient number, since it is larger than the sum of its proper divisors (15871625724).

21150124804 is a wasteful number, since it uses less digits than its factorization.

21150124804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290306 (or 1290304 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 21150124804 its reverse (40842105112), we get a palindrome (61992229916).

The spelling of 21150124804 in words is "twenty-one billion, one hundred fifty million, one hundred twenty-four thousand, eight hundred four".