20708274514085 has 4 divisors (see below), whose sum is σ = 24849929416908. Its totient is φ = 16566619611264.

The previous prime is 20708274514049. The next prime is 20708274514091. The reversal of 20708274514085 is 58041547280702.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16124834549476 + 4583439964609 = 4015574^2 + 2140897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20708274514085 is a prime.

It is a Duffinian number.

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, 2070827451404 + ... + 2070827451413.

It is an arithmetic number, because the mean of its divisors is an integer number (6212482354227).

Almost surely, 2^{20708274514085} is an apocalyptic number.

It is an amenable number.

20708274514085 is a deficient number, since it is larger than the sum of its proper divisors (4141654902823).

20708274514085 is an equidigital number, since it uses as much as digits as its factorization.

20708274514085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141654902822.

The product of its (nonzero) digits is 5017600, while the sum is 53.

The spelling of 20708274514085 in words is "twenty trillion, seven hundred eight billion, two hundred seventy-four million, five hundred fourteen thousand, eighty-five".