20613959261716 has 12 divisors (see below), whose sum is σ = 36085600743220. Its totient is φ = 10303787620800.

The previous prime is 20613959261699. The next prime is 20613959261767. The reversal of 20613959261716 is 61716295931602.

It can be written as a sum of positive squares in 2 ways, for example, as 11550849011716 + 9063110250000 = 3398654^2 + 3010500^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797987985 + ... + 798013816.

Almost surely, 2^{20613959261716} is an apocalyptic number.

It is an amenable number.

20613959261716 is a deficient number, since it is larger than the sum of its proper divisors (15471641481504).

20613959261716 is a wasteful number, since it uses less digits than its factorization.

20613959261716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596005034 (or 1596005032 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 20613959261716 in words is "twenty trillion, six hundred thirteen billion, nine hundred fifty-nine million, two hundred sixty-one thousand, seven hundred sixteen".