20551868683 has 8 divisors (see below), whose sum is σ = 21265987680. Its totient is φ = 19838112000.

The previous prime is 20551868657. The next prime is 20551868693. The reversal of 20551868683 is 38686815502.

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 20551868683 - 2⁹ = 20551868171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20551868683.

It is not an unprimeable number, because it can be changed into a prime (20551868693) 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, 27466 + ... + 204592.

It is an arithmetic number, because the mean of its divisors is an integer number (2658248460).

Almost surely, 2^20551868683 is an apocalyptic number.

20551868683 is a deficient number, since it is larger than the sum of its proper divisors (714118997).

20551868683 is a wasteful number, since it uses less digits than its factorization.

20551868683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181157.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 20551868683 in words is "twenty billion, five hundred fifty-one million, eight hundred sixty-eight thousand, six hundred eighty-three".