20688684232 has 16 divisors (see below), whose sum is σ = 38794665600. Its totient is φ = 10343440080.

The previous prime is 20688684221. The next prime is 20688684319. The reversal of 20688684232 is 23248688602.

It is a happy 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, 9744 + ... + 203647.

It is an arithmetic number, because the mean of its divisors is an integer number (2424666600).

Almost surely, 2^20688684232 is an apocalyptic number.

It is an amenable number.

20688684232 is a deficient number, since it is larger than the sum of its proper divisors (18105981368).

20688684232 is a wasteful number, since it uses less digits than its factorization.

20688684232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225516 (or 225512 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 20688684232 in words is "twenty billion, six hundred eighty-eight million, six hundred eighty-four thousand, two hundred thirty-two".