20686863358 has 16 divisors (see below), whose sum is σ = 37329678720. Its totient is φ = 8399177496.

The previous prime is 20686863349. The next prime is 20686863367. The reversal of 20686863358 is 85336868602.

It is an interprime number because it is at equal distance from previous prime (20686863349) and next prime (20686863367).

It is a junction number, because it is equal to n+sod(n) for n = 20686863299 and 20686863308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38884816 + ... + 38885347.

It is an arithmetic number, because the mean of its divisors is an integer number (2333104920).

Almost surely, 2^20686863358 is an apocalyptic number.

20686863358 is a deficient number, since it is larger than the sum of its proper divisors (16642815362).

20686863358 is a wasteful number, since it uses less digits than its factorization.

20686863358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77770191.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 20686863358 in words is "twenty billion, six hundred eighty-six million, eight hundred sixty-three thousand, three hundred fifty-eight".