21042525004 has 48 divisors (see below), whose sum is σ = 40314534400. Its totient is φ = 9575257536.

The previous prime is 21042524981. The next prime is 21042525017. The reversal of 21042525004 is 40052524012.

It is a self number, because there is not a number n which added to its sum of digits gives 21042525004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174787 + ... + 269509.

Almost surely, 2^21042525004 is an apocalyptic number.

It is an amenable number.

21042525004 is a deficient number, since it is larger than the sum of its proper divisors (19272009396).

21042525004 is a wasteful number, since it uses less digits than its factorization.

21042525004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94862 (or 94860 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 21042525004 in words is "twenty-one billion, forty-two million, five hundred twenty-five thousand, four".