23555020477 has 2 divisors, whose sum is σ = 23555020478. Its totient is φ = 23555020476.

The previous prime is 23555020471. The next prime is 23555020483. The reversal of 23555020477 is 77402055532.

It is a balanced prime because it is at equal distance from previous prime (23555020471) and next prime (23555020483).

It can be written as a sum of positive squares in only one way, i.e., 16577592516 + 6977427961 = 128754^2 + 83531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23555020477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23555020471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11777510238 + 11777510239.

It is an arithmetic number, because the mean of its divisors is an integer number (11777510239).

Almost surely, 2^23555020477 is an apocalyptic number.

It is an amenable number.

23555020477 is a deficient number, since it is larger than the sum of its proper divisors (1).

23555020477 is an equidigital number, since it uses as much as digits as its factorization.

23555020477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294000, while the sum is 40.

The spelling of 23555020477 in words is "twenty-three billion, five hundred fifty-five million, twenty thousand, four hundred seventy-seven".