23505533477 has 2 divisors, whose sum is σ = 23505533478. Its totient is φ = 23505533476.

The previous prime is 23505533453. The next prime is 23505533483. The reversal of 23505533477 is 77433550532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16240698721 + 7264834756 = 127439^2 + 85234^2 .

It is a cyclic number.

It is not a de Polignac number, because 23505533477 - 2⁸ = 23505533221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23505533437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11752766738 + 11752766739.

It is an arithmetic number, because the mean of its divisors is an integer number (11752766739).

Almost surely, 2^23505533477 is an apocalyptic number.

It is an amenable number.

23505533477 is a deficient number, since it is larger than the sum of its proper divisors (1).

23505533477 is an equidigital number, since it uses as much as digits as its factorization.

23505533477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323000, while the sum is 44.

The spelling of 23505533477 in words is "twenty-three billion, five hundred five million, five hundred thirty-three thousand, four hundred seventy-seven".