20474698687 has 2 divisors, whose sum is σ = 20474698688. Its totient is φ = 20474698686.

The previous prime is 20474698637. The next prime is 20474698703. The reversal of 20474698687 is 78689647402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20474698687 - 2¹⁵ = 20474665919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20474698637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237349343 + 10237349344.

It is an arithmetic number, because the mean of its divisors is an integer number (10237349344).

Almost surely, 2^20474698687 is an apocalyptic number.

20474698687 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474698687 is an equidigital number, since it uses as much as digits as its factorization.

20474698687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 20474698687 in words is "twenty billion, four hundred seventy-four million, six hundred ninety-eight thousand, six hundred eighty-seven".