20521004041 has 16 divisors (see below), whose sum is σ = 22167250560. Its totient is φ = 18938550400.

The previous prime is 20521003999. The next prime is 20521004051. The reversal of 20521004041 is 14040012502.

It is a cyclic number.

It is not a de Polignac number, because 20521004041 - 2¹¹ = 20521001993 is a prime.

It is a super-2 number, since 2×20521004041² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20521004051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005741 + ... + 1025941.

It is an arithmetic number, because the mean of its divisors is an integer number (1385453160).

Almost surely, 2^20521004041 is an apocalyptic number.

It is an amenable number.

20521004041 is a deficient number, since it is larger than the sum of its proper divisors (1646246519).

20521004041 is a wasteful number, since it uses less digits than its factorization.

20521004041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21776.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 20521004041 its reverse (14040012502), we get a palindrome (34561016543).

The spelling of 20521004041 in words is "twenty billion, five hundred twenty-one million, four thousand, forty-one".