20493067687 has 2 divisors, whose sum is σ = 20493067688. Its totient is φ = 20493067686.

The previous prime is 20493067631. The next prime is 20493067711. The reversal of 20493067687 is 78676039402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20493067687 - 2¹¹ = 20493065639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20493067787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10246533843 + 10246533844.

It is an arithmetic number, because the mean of its divisors is an integer number (10246533844).

Almost surely, 2^20493067687 is an apocalyptic number.

20493067687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20493067687 is an equidigital number, since it uses as much as digits as its factorization.

20493067687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 20493067687 in words is "twenty billion, four hundred ninety-three million, sixty-seven thousand, six hundred eighty-seven".