20634477836686 has 8 divisors (see below), whose sum is σ = 35373390577200. Its totient is φ = 8843347644288.

The previous prime is 20634477836677. The next prime is 20634477836741. The reversal of 20634477836686 is 68663877443602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×20634477836686³ (a number of 41 digits) contains 333 as substring.

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, 736945637011 + ... + 736945637038.

It is an arithmetic number, because the mean of its divisors is an integer number (4421673822150).

Almost surely, 2^{20634477836686} is an apocalyptic number.

20634477836686 is a deficient number, since it is larger than the sum of its proper divisors (14738912740514).

20634477836686 is a wasteful number, since it uses less digits than its factorization.

20634477836686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473891274058.

The product of its (nonzero) digits is 1170505728, while the sum is 70.

The spelling of 20634477836686 in words is "twenty trillion, six hundred thirty-four billion, four hundred seventy-seven million, eight hundred thirty-six thousand, six hundred eighty-six".