20610686959 has 4 divisors (see below), whose sum is σ = 20641963320. Its totient is φ = 20579410600.

The previous prime is 20610686951. The next prime is 20610686969. The reversal of 20610686959 is 95968601602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20610686959 - 2³ = 20610686951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20610686951) by changing a digit.

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, 15637192 + ... + 15638509.

It is an arithmetic number, because the mean of its divisors is an integer number (5160490830).

Almost surely, 2^20610686959 is an apocalyptic number.

20610686959 is a deficient number, since it is larger than the sum of its proper divisors (31276361).

20610686959 is an equidigital number, since it uses as much as digits as its factorization.

20610686959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31276360.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 20610686959 in words is "twenty billion, six hundred ten million, six hundred eighty-six thousand, nine hundred fifty-nine".