20521412411 has 2 divisors, whose sum is σ = 20521412412. Its totient is φ = 20521412410.

The previous prime is 20521412371. The next prime is 20521412423. The reversal of 20521412411 is 11421412502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20521412411 - 2¹⁸ = 20521150267 is a prime.

It is a super-2 number, since 2×20521412411² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20521412311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260706205 + 10260706206.

It is an arithmetic number, because the mean of its divisors is an integer number (10260706206).

Almost surely, 2^20521412411 is an apocalyptic number.

20521412411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20521412411 is an equidigital number, since it uses as much as digits as its factorization.

20521412411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 20521412411 its reverse (11421412502), we get a palindrome (31942824913).

Subtracting from 20521412411 its reverse (11421412502), we obtain a palindrome (9099999909).

The spelling of 20521412411 in words is "twenty billion, five hundred twenty-one million, four hundred twelve thousand, four hundred eleven".