20654985388 has 18 divisors (see below), whose sum is σ = 36689899596. Its totient is φ = 10172192184.

The previous prime is 20654985361. The next prime is 20654985427. The reversal of 20654985388 is 88358945602.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2348383 + ... + 2357161.

Almost surely, 2^20654985388 is an apocalyptic number.

It is an amenable number.

20654985388 is a deficient number, since it is larger than the sum of its proper divisors (16034914208).

20654985388 is an frugal number, since it uses more digits than its factorization.

20654985388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17629 (or 8848 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 58.

The spelling of 20654985388 in words is "twenty billion, six hundred fifty-four million, nine hundred eighty-five thousand, three hundred eighty-eight".