20004079687 has 2 divisors, whose sum is σ = 20004079688. Its totient is φ = 20004079686.

The previous prime is 20004079663. The next prime is 20004079709. The reversal of 20004079687 is 78697040002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20004079687 - 2¹⁵ = 20004046919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004074687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002039843 + 10002039844.

It is an arithmetic number, because the mean of its divisors is an integer number (10002039844).

Almost surely, 2^20004079687 is an apocalyptic number.

20004079687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004079687 is an equidigital number, since it uses as much as digits as its factorization.

20004079687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 20004079687 in words is "twenty billion, four million, seventy-nine thousand, six hundred eighty-seven".