20231478511 has 2 divisors, whose sum is σ = 20231478512. Its totient is φ = 20231478510.

The previous prime is 20231478497. The next prime is 20231478601. The reversal of 20231478511 is 11587413202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20231478511 - 2⁷ = 20231478383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20231478811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115739255 + 10115739256.

It is an arithmetic number, because the mean of its divisors is an integer number (10115739256).

Almost surely, 2^20231478511 is an apocalyptic number.

20231478511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20231478511 is an equidigital number, since it uses as much as digits as its factorization.

20231478511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 20231478511 in words is "twenty billion, two hundred thirty-one million, four hundred seventy-eight thousand, five hundred eleven".