20117625632477 has 2 divisors, whose sum is σ = 20117625632478. Its totient is φ = 20117625632476.

The previous prime is 20117625632443. The next prime is 20117625632497. The reversal of 20117625632477 is 77423652671102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10967085332281 + 9150540300196 = 3311659^2 + 3024986^2 .

It is a cyclic number.

It is not a de Polignac number, because 20117625632477 - 2³⁶ = 20048906155741 is a prime.

It is a super-2 number, since 2×20117625632477² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117625632407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058812816238 + 10058812816239.

It is an arithmetic number, because the mean of its divisors is an integer number (10058812816239).

Almost surely, 2^{20117625632477} is an apocalyptic number.

It is an amenable number.

20117625632477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117625632477 is an equidigital number, since it uses as much as digits as its factorization.

20117625632477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The spelling of 20117625632477 in words is "twenty trillion, one hundred seventeen billion, six hundred twenty-five million, six hundred thirty-two thousand, four hundred seventy-seven".