20513620411 has 2 divisors, whose sum is σ = 20513620412. Its totient is φ = 20513620410.

The previous prime is 20513620357. The next prime is 20513620447. The reversal of 20513620411 is 11402631502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20513620411 - 2²¹ = 20511523259 is a prime.

It is not a weakly prime, because it can be changed into another prime (20513620481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256810205 + 10256810206.

It is an arithmetic number, because the mean of its divisors is an integer number (10256810206).

Almost surely, 2^20513620411 is an apocalyptic number.

20513620411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20513620411 is an equidigital number, since it uses as much as digits as its factorization.

20513620411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 20513620411 in words is "twenty billion, five hundred thirteen million, six hundred twenty thousand, four hundred eleven".