20688288662 has 8 divisors (see below), whose sum is σ = 32665719000. Its totient is φ = 9799715664.

The previous prime is 20688288661. The next prime is 20688288683. The reversal of 20688288662 is 26688288602.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20688288598 and 20688288607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20688288661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272214287 + ... + 272214362.

It is an arithmetic number, because the mean of its divisors is an integer number (4083214875).

Almost surely, 2^20688288662 is an apocalyptic number.

20688288662 is a deficient number, since it is larger than the sum of its proper divisors (11977430338).

20688288662 is a wasteful number, since it uses less digits than its factorization.

20688288662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544428670.

The product of its (nonzero) digits is 7077888, while the sum is 56.

The spelling of 20688288662 in words is "twenty billion, six hundred eighty-eight million, two hundred eighty-eight thousand, six hundred sixty-two".