20604230687 has 2 divisors, whose sum is σ = 20604230688. Its totient is φ = 20604230686.

The previous prime is 20604230683. The next prime is 20604230723. The reversal of 20604230687 is 78603240602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20604230687 - 2² = 20604230683 is a prime.

It is a super-2 number, since 2×20604230687² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20604230687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20604230681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10302115343 + 10302115344.

It is an arithmetic number, because the mean of its divisors is an integer number (10302115344).

Almost surely, 2^20604230687 is an apocalyptic number.

20604230687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20604230687 is an equidigital number, since it uses as much as digits as its factorization.

20604230687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 20604230687 in words is "twenty billion, six hundred four million, two hundred thirty thousand, six hundred eighty-seven".