20735868 has 12 divisors (see below), whose sum is σ = 48383720. Its totient is φ = 6911952.

The previous prime is 20735849. The next prime is 20735887. The reversal of 20735868 is 86853702.

It is an interprime number because it is at equal distance from previous prime (20735849) and next prime (20735887).

It is a tau number, because it is divible by the number of its divisors (12).

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, 863983 + ... + 864006.

Almost surely, 2^20735868 is an apocalyptic number.

It is an amenable number.

20735868 is an abundant number, since it is smaller than the sum of its proper divisors (27647852).

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

20735868 is a wasteful number, since it uses less digits than its factorization.

20735868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727996 (or 1727994 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20735868 is about 4553.6653368468. The cubic root of 20735868 is about 274.7308352552.

The spelling of 20735868 in words is "twenty million, seven hundred thirty-five thousand, eight hundred sixty-eight".