20697099168 has 48 divisors (see below), whose sum is σ = 54381843936. Its totient is φ = 6892435200.

The previous prime is 20697099121. The next prime is 20697099173. The reversal of 20697099168 is 86199079602.

It is a tau number, because it is divible by the number of its divisors (48).

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, 1671 + ... + 203462.

It is an arithmetic number, because the mean of its divisors is an integer number (1132955082).

Almost surely, 2^20697099168 is an apocalyptic number.

It is an amenable number.

20697099168 is an abundant number, since it is smaller than the sum of its proper divisors (33684744768).

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

20697099168 is a wasteful number, since it uses less digits than its factorization.

20697099168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206197 (or 206189 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 20697099168 in words is "twenty billion, six hundred ninety-seven million, ninety-nine thousand, one hundred sixty-eight".