21041030004 has 12 divisors (see below), whose sum is σ = 49095736704. Its totient is φ = 7013676664.

The previous prime is 21041029991. The next prime is 21041030009. The reversal of 21041030004 is 40003014012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041030009) 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, 876709572 + ... + 876709595.

It is an arithmetic number, because the mean of its divisors is an integer number (4091311392).

Almost surely, 2^21041030004 is an apocalyptic number.

It is an amenable number.

21041030004 is an abundant number, since it is smaller than the sum of its proper divisors (28054706700).

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

21041030004 is a wasteful number, since it uses less digits than its factorization.

21041030004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753419174 (or 1753419172 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21041030004 its reverse (40003014012), we get a palindrome (61044044016).

The spelling of 21041030004 in words is "twenty-one billion, forty-one million, thirty thousand, four".