20684885502 has 8 divisors (see below), whose sum is σ = 41369771016. Its totient is φ = 6894961832.

The previous prime is 20684885489. The next prime is 20684885513. The reversal of 20684885502 is 20558848602.

It is a happy number.

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

20684885502 is an admirable number.

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, 1723740453 + ... + 1723740464.

It is an arithmetic number, because the mean of its divisors is an integer number (5171221377).

Almost surely, 2^20684885502 is an apocalyptic number.

20684885502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20684885502 is a wasteful number, since it uses less digits than its factorization.

20684885502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447480922.

The product of its (nonzero) digits is 1228800, while the sum is 48.

The spelling of 20684885502 in words is "twenty billion, six hundred eighty-four million, eight hundred eighty-five thousand, five hundred two".