20045308487 has 2 divisors, whose sum is σ = 20045308488. Its totient is φ = 20045308486.

The previous prime is 20045308477. The next prime is 20045308499. The reversal of 20045308487 is 78480354002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20045308487 - 2³⁴ = 2865439303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20045308477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022654243 + 10022654244.

It is an arithmetic number, because the mean of its divisors is an integer number (10022654244).

Almost surely, 2^20045308487 is an apocalyptic number.

20045308487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20045308487 is an equidigital number, since it uses as much as digits as its factorization.

20045308487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 20045308487 in words is "twenty billion, forty-five million, three hundred eight thousand, four hundred eighty-seven".