20218688908 has 24 divisors (see below), whose sum is σ = 38612556864. Its totient is φ = 9187160400.

The previous prime is 20218688891. The next prime is 20218688929. The reversal of 20218688908 is 80988681202.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

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, 53391 + ... + 208057.

It is an arithmetic number, because the mean of its divisors is an integer number (1608856536).

Almost surely, 2^20218688908 is an apocalyptic number.

It is an amenable number.

20218688908 is a deficient number, since it is larger than the sum of its proper divisors (18393867956).

20218688908 is a wasteful number, since it uses less digits than its factorization.

20218688908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157653 (or 157651 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 20218688908 in words is "twenty billion, two hundred eighteen million, six hundred eighty-eight thousand, nine hundred eight".