20215702868 has 24 divisors (see below), whose sum is σ = 36055853568. Its totient is φ = 9914145696.

The previous prime is 20215702849. The next prime is 20215702879. The reversal of 20215702868 is 86820751202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 798005 + ... + 822947.

It is an arithmetic number, because the mean of its divisors is an integer number (1502327232).

Almost surely, 2^20215702868 is an apocalyptic number.

It is an amenable number.

20215702868 is a deficient number, since it is larger than the sum of its proper divisors (15840150700).

20215702868 is a wasteful number, since it uses less digits than its factorization.

20215702868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28823 (or 28821 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 20215702868 in words is "twenty billion, two hundred fifteen million, seven hundred two thousand, eight hundred sixty-eight".