20669556716 has 24 divisors (see below), whose sum is σ = 37210701696. Its totient is φ = 10038850560.

The previous prime is 20669556701. The next prime is 20669556751. The reversal of 20669556716 is 61765596602.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25205 + ... + 204876.

It is an arithmetic number, because the mean of its divisors is an integer number (1550445904).

Almost surely, 2^20669556716 is an apocalyptic number.

It is an amenable number.

20669556716 is a deficient number, since it is larger than the sum of its proper divisors (16541144980).

20669556716 is a wasteful number, since it uses less digits than its factorization.

20669556716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230729 (or 230727 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 20669556716 in words is "twenty billion, six hundred sixty-nine million, five hundred fifty-six thousand, seven hundred sixteen".