20686641053 has 8 divisors (see below), whose sum is σ = 22751920128. Its totient is φ = 18689076144.

The previous prime is 20686640981. The next prime is 20686641067. The reversal of 20686641053 is 35014668602.

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

It is a cyclic number.

It is not a de Polignac number, because 20686641053 - 2²² = 20682446749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20686641053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20686644053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16927901 + ... + 16929122.

It is an arithmetic number, because the mean of its divisors is an integer number (2843990016).

Almost surely, 2^20686641053 is an apocalyptic number.

It is an amenable number.

20686641053 is a deficient number, since it is larger than the sum of its proper divisors (2065279075).

20686641053 is a wasteful number, since it uses less digits than its factorization.

20686641053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33857083.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 20686641053 in words is "twenty billion, six hundred eighty-six million, six hundred forty-one thousand, fifty-three".