20507523891704 has 16 divisors (see below), whose sum is σ = 38475684720600. Its totient is φ = 10247341299552.

The previous prime is 20507523891683. The next prime is 20507523891823. The reversal of 20507523891704 is 40719832570502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802567214 + ... + 802592765.

Almost surely, 2^{20507523891704} is an apocalyptic number.

It is an amenable number.

20507523891704 is a deficient number, since it is larger than the sum of its proper divisors (17968160828896).

20507523891704 is a wasteful number, since it uses less digits than its factorization.

20507523891704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605161582 (or 1605161578 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 20507523891704 in words is "twenty trillion, five hundred seven billion, five hundred twenty-three million, eight hundred ninety-one thousand, seven hundred four".