21004104041 has 8 divisors (see below), whose sum is σ = 21253800960. Its totient is φ = 20754711648.

The previous prime is 21004104031. The next prime is 21004104047. The reversal of 21004104041 is 14040140012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21004104041 - 2²² = 20999909737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21004104047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64160 + ... + 214766.

It is an arithmetic number, because the mean of its divisors is an integer number (2656725120).

Almost surely, 2^21004104041 is an apocalyptic number.

It is an amenable number.

21004104041 is a deficient number, since it is larger than the sum of its proper divisors (249696919).

21004104041 is a wasteful number, since it uses less digits than its factorization.

21004104041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152263.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21004104041 its reverse (14040140012), we get a palindrome (35044244053).

The spelling of 21004104041 in words is "twenty-one billion, four million, one hundred four thousand, forty-one".